Hydration is one of the most important, and easiest to neglect, aspects of training. But, new technologies that both regulate your beverage\u2019s temperature and make using a bottle more convenient on-the-go can help keep you drinking before, during, or after a run. From easy-to-carry handhelds and flexible flasks to vacuum-sealed, insulated tumblers for keeping your post-run drink of choice (beer included) ice cold, these are the best bottles to help quench your thirst. See five of our top picks below or keep scrolling for more bottles we love, plus buying tips and expert advice. Handhelds, Tumblers, and More Reusable Options Instead of grabbing a single-use plastic water bottle, keep a reusable option at the ready. Stainless steel, vacuum-walled tumblers keep liquids hot or cold, and are ideal for hydrating in between workouts. For long runs and days you hit the trails, handhelds and fuel belts make water accessible when there are no fountains on your route. Belts and hydration packs will keep your hands free, and many also offer additional pockets for gels and extra clothing. And collapsible bottles are easily portable because they fold up small, stow away quickly, and use specialized locking valves to prevent leakage. How We Tested and Selected For every bottle and handheld, we noted characteristics from weight and volume to versatility and mouthfeel. We took into account runners who prefer a pop-up top or a wide opening, and inspected interior scent and taste. In addition, we evaluated how easy each bottle is to use, carry, and clean. We also performed a cold temperature test on the insulated tumblers. We filled the bottles with 10 ice cubes, topped them off with water to the brim, and measured their initial temperatures. Over the next 24 hours, we took readings at regular intervals, shaking the bottles prior to each measurement to ensure that the water temperature was consistent throughout. We followed up with a leak test, in which we added dye to each of the bottles, screwed the lids tightly shut, and then wrapped them in white paper towels secured by a rubber band. We then placed them in ziplock bags and shook, rolled, jostled, suspended them upside down, and laid them on their sides for 24 hours. We\u2019ve included our findings in the summaries for each bottle below. Handhelds and Pouches \u2014LIGHT AND COLLAPSIBLE\u2014 Nathan ExoShot 2.0 Volume: 14 oz. | Use: Cold Liquids Only This collapsible bottle has a comfy hand strap for grip-free running. The sleeve has a slim pocket to store gummies or gels, which makes the ExoShot ideal for marathon training or trail runs. \u201cThe bottle was easy to fill, and the cap screwed on securely,\u201d said our tester, Erin, who took the bottle out on a hilly five-mile run. \u201cAfter two miles of running with a full bottle, I forgot that I was carrying it. The bite valve was also simple to use.\u201d For longer and sweatier efforts during the summer, we like the ExoShot\u2019s big brother, the ExoDraw . This larger model holds an additional four ounces, and also comes in an insulated version. (It won\u2019t preserve solid ice cubes for hours at a time, but it did keep our water noticeably colder\u2014firmly out of lukewarm territory.) Read Review \u2014MOST STORAGE SPACE\u2014 Nathan SpeedDraw Plus Insulated Volume: 18 oz. | Use: Cold Liquids Only One issue some runners have with plastic handhelds is the bottles tend to get slippery from sweat and spillage\u2014no matter how taut the strap is around your hand. The SpeedDraw resolves this problem with a rubber backing and textured plastic on the sides so you won\u2019t need to run with a clenched fist. \u201cEvery feature of the bottle is designed with comfort and function in mind,\u201d said our photo editor Kristen Parker. \u201cThe hand strap is made of a soft fabric and is adjustable to create a snug fit for different sizes. Even though the bottle is made of a harder plastic, it still feels soft and flexible and squeezes easily in your hand.\u201d Read Review \u2014SECURE GRIP\u2014 Amphipod Hydraform Ergo Minimalist Volumes: 16, 20 oz. | Use: Cold Liquids Only Testers loved Amphipod\u2019s handheld for its ergonomic shape. The adjustable hand strap is so soft and comfy, the Hydraform Ergo Minimalist essentially becomes a part of your hand. One tester commented how she even forgot she was holding it as she ran. The hand strap also has two easy-access gel holders. A self-sealing valve on the Jett-Lock cap allows you to squeeze the bottle and release as much water as you need. Read Review \u2014SAFE TO FREEZE\u2014 Hydrapak SkyFlask Volumes: 17 oz. | Use: Cold and Hot Liquids Our video producer and resident ultrarunner Pat Heine knows a thing or two about hydration on the trails. He tested the previous model, the SoftFlask , with its high-flow bite valve that quickly releases water and sports drinks. The cap also twists to lock, but Pat found it didn\u2019t leak a drop when it was unlocked\u2014no matter how hard he squeezed it. \u201cI found myself having to grip the bottle a bit more than I prefer,\u201d said Pat, \u201cbut it\u2019s not a dealbreaker since once the bottle is empty it\u2019s practically weightless and easily tucks into the waistband on a pair of shorts.\u201d HydraFlask\u2019s newest SkyFlask solves that minor issue by swapping out the non-adjustable carrying loop in the original version for a new durable nylon strap, which cinches down for a more secure grip with sweaty hands. Plus, it\u2019s safe to toss in the freezer or fill with liquids up to 140 degrees F. \u2014BEST FILTRATION\u2014 Katadyn BeFree Collapsible Volumes: 20, 34 oz. | Use: Cold Liquids Only Drinking water from backcountry sources can quickly change your great experience into a miserable few days locked in the bathroom. The BeFree has a .01 micron filter, ensuring that you\u2019ll be drinking safe water whenever you need it. The filter is built into the cap of the flask, so water is filtered as you drink it. When you find yourself rushing to the nearest creek for emergency water on that hotter-than-expected day, the large screw-top opening fills quickly so you can get moving again. Noticeably larger than most soft flasks, it won\u2019t fit in the front pockets on most hydration packs when full, but it still collapses to slightly larger than the size of the filter and cap so you can stash it when you don\u2019t need it. For anyone venturing out for a long day in the mountains, it\u2019s a crucial piece of kit for real self-sufficiency. \u2014FOR LONG RUNS\u2014 FITLY Soft Water Bottle Volumes: 5, 8.5, 12, 13.5, 17 oz. | Use: Cold Liquids For long runs you want a larger reserve of water and you might even want to hold it on your back. A bottle like this is designed to sit in a hydration vest and has a straw that lets you drink without having to hold a bottle or retrieve it from a pack. This one holds up to 17 ounces of water, which is about the size of a large hand held, but easier to carry. It fits in any standard water vest, and even has a great feature which allows it to shrink down as you drink from it, preventing any sloshing as you run. It also comes in smaller, handheld options if you prefer that option, which are also great sturdy water bottles, or can even be used for homemade gels. Bottles and Tumblers \u2014MOST SIZES AND COLORS\u2014 Takeya Actives Volumes: 18, 22, 24, 32, 40, 64 oz. | Use: Hot and Cold Liquids Takeya\u2019s Actives bottle wasn\u2019t exceptionally great during our temperature testing. After 24 hours, the water in the bottle rose from 38 to 59 degrees, leaving us with water that was just below room temp. However, it started out strong, with the temperature rising just four degrees during the first eight hours. That makes the Actives a great choice if you need a bottle to keep your water chilly for a full day at your desk\u2014it also comes in a boatload of sizes and colors. During testing we found that the twist cap is totally leakproof, and the hinge keeps its slim handle and lid securely positioned away from the spout while you drink, so it won\u2019t flop down on your nose mid-sip. Plus, we like the removable silicone bumper around the base of the bottle, which prevented nicks and bumps on table surfaces when we couldn\u2019t find a coaster. (Don\u2019t worry, the bottle is still sweatproof, so it won\u2019t leave a ring.) The only drawback is that the bumper sometimes slides off the bottle\u2019s base and gets lodged in a car\u2019s cupholder. \u2014MULTIPLE LID OPTIONS\u2014 HydroFlask Wide Mouth Bottle Volumes: 20, 32, 40, 64 oz. | Use: Hot and Cold Liquids HydroFlasks have become a fan favorite for their fun colors, reliable insulation, and multiple sizes. This one has options ranging from 20 ounces up to 64, but what is great is that they all have the same cap size, so you won't have to worry about getting the right sized bottle cap as long as it is 'HydroFlask wide-mouth compatible'. And there are quite a few lids to choose from with a handled twist off, straw-sip, twist chug lid, and coffee top lid. The bottles also come in 16 colors with options from understated neutrals to vibrant colors, and have a powder coating which gives the bottle better grip and prevents sweating on the outside surface. \u2014MOST VERSATILE\u2014 Blender Bottle Halex Insulated Volume: 24 oz. | Use: Cold Liquids Only Best known for its shaker cup with a wire whisking ball , Blender Bottle has more recently branched out to other hydration vessels. We tested the insulated version of the Halex, which fits securely in a bike cage, but is loaded with features that we like for our running workouts on the track. The spout has three settings: locked, traditional (the classic tilt-and-squeeze option), or vertical, which squirts water into your mouth while upright. This makes it handy for keeping your eyes on the road while cycling, and for quick slugs between sprint intervals. Compared to an insulated stainless steel tumbler, the Halex is lighter and more streamlined, but doesn\u2019t keep your drink as cold. (Still, it kept our water chilly for three times as long as a non-insulated model; it took our water over three hours to warm past 60 degrees, while a regular bottle lasted just over an hour on a hot ride.) Plus, we like that a collapsible mixing ball works in the Halex if you want to add a Nuun tab or protein powder for post-run recovery. (You\u2019ll have to remove the bottles\u2019s straw first, though.) \u2014MOST DURABLE\u2014 Yeti Rambler Volumes: 12, 18, 26, 36, 46 oz. | Use: Hot and Cold Liquids* If you seek durability, go with the Rambler. It\u2019s one of the most rugged we\u2019ve every tested, thanks to its double-walled, vacuum-sealed stainless steel build and shatterproof cap. The Rambler withstood repeated drops and multiple cycles through the dishwasher without an issue. We also like that the entire lid unscrews to expose a wide mouth, so there\u2019s no fussing with trying to squeeze ice cubes through the narrower spout opening. While the slimmer handle on the Takeya, above, didn\u2019t feel especially flimsy, the handle on this Yeti is thick and hefty with a much sturdier feel in comparison. We recommend it for runners who will likely be roughing up their bottle a little more on the trails\u2014or have a tendency to leave a bottle rolling around under the passenger seat of your car. *Not a drop spilled out from the Rambler\u2019s chug cap during our leak test, but take note that it\u2019s not designed for hot beverages. If you need a caffeine kick on the go, make sure it\u2019s iced coffee. \u2014FASTEST FLOW RATE\u2014 Bivo One Volume: 21 oz. | Use: Cold Liquids Only The Bivo is really designed for cyclists, but runners will dig it at the track or even just for post-run refreshment. It\u2019s stainless steel inside, so you don\u2019t get that yucky plastic taste, but a silicone exterior makes it\u2019s grippy. Pull up on the silicone nozzle and tip the bottle upside down for a fast slurp of water. Your drink gushes out really fast\u2014you don\u2019t have to squeeze the bottle or suck on the nozzle\u2014which makes it perfect for grabbing in between reps or intervals when you\u2019ve got only a quick second to slurp down what you can. Push the silicone nozzle back down to close it. The only drawbacks are that it\u2019s not 100 percent leak-proof, and it\u2019s not insulated. \u2014MOST COMPACT\u2014 Que The Collapsible Bottle Volume: 12, 20 oz. (fully expanded) | Use: Hot and Cold Liquids \u201cNormally, I have to arrange my workout essentials just so, or I struggle to zip the bag closed,\u201d said test editor Adrienne Donica, \u201cbut the Que\u2019s compact size\u2014it\u2019s less than 5 inches tall when collapsed\u2014made it fit with no hassle.\u201d Que\u2019s bottle is made of 100 percent food-grade silicone, and has a set of grooves that spiral up the outside. These grooves allow the pliable silicone to fold in on itself. And when the Que is expanded, the grooves give you a place for your fingers to grip the bottle securely. Read Review \u2014BEST TUMBLER\u2014 Simple Modern Tumbler Volumes: 12, 16, 20, 24, 28, 32 oz. | Use: Hot and Cold Liquids If you are someone that needs a straw with every drink, you probably feel that way about water too. This tumbler comes with a leak resistant top that won't destroy a stack of papers if knocked over\u2014though it may spill a tad, so don't think it is equivalent to a leak proof model. It comes in multiple sizes, and is easy to clean with a wide mouth and twist off top. It has a stainless steel interior so it won't hold on to flavors if you put something besides water in it, and comes with a straw top and coffee lid top so it's great for hot drinks as well. It also has a bunch of fun color and pattern options, and it fits in a standard cup holder. \u2014BEST INSULATION\u2014 Avana Ashbury Volumes: 18, 24 oz. | Use: Hot and Cold Liquids The Avana wowed us in testing with its ability to keep our water cool, thanks to its triple-walled (not double) insulation. After 10 hours, our water was just as cold as when we filled up the bottle. In fact, after 24 hours in a 70-degree room, the water warmed a mere seven degrees, making it the top performer of all the insulated models we tested. As sleek as it is functional, the Ashbury uses a specially designed mouthpiece and straw so you can tilt the bottle and swig, or simply sip from it without lifting a finger. The fully leakproof lid is topped off with a flexible easy-carry loop, which we found surprisingly durable despite its slim appearance. Plus, each Avana bottle supports clean water initiatives around the world and comes with a unique donation code so you can track in real-time which projects you\u2019re helping. \u2014EXTRA STORAGE COMPARTMENT\u2014 Bindle Bottle Volume: 20, 24 oz. | Use: Hot and Cold Liquids Hydration is important\u2014as is having a designated place to store your keys, cash, and post-run fuel. If you find yourself rifling through your bag looking for your house key after a run, or perhaps often find someone tapping your shoulder at the gym asking, \u201cExcuse me, is this your ID card?\u201d as you sip from a no-frills bottle, then the Bindle will save you time, give you peace of mind, and quench your thirst. The rotund, vacuum-walled bottle stores ice-cold water and has a bottom compartment with room enough to store house and car keys, a small tub of Vaseline, a debit card, and earbuds.