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"The water bottles are both rollable and foldable."
Best Design: Mountop Collapsible Silicone Water Bottle at Amazon
"Comes in colors like icy blue and millennial pink."
Best Lightweight: Platypus Platy 2-Liter Water Bottle at Amazon
"Weighs just 1.3 ounces when it’s empty."
Best for Backpacking: Nomader Collapsible Water Bottle at Amazon
"Loops around your wrist, making it easy to keep water on hand."
Best for Hot Liquids: HydraPak UltraFlask 500 Water Bottle at Amazon
"Can hold water up to 140 degrees Fahrenheit."
Best with Case: HYDAWAY Hydration Travel Pack at Amazon
"Ensures that the mouthpiece isn’t going to touch anything that’s not clean."
Best FDA-Approved: Kemier Collapsible Silicone Water Bottles at Amazon
"Made from 100-percent medical-grade material."
Best for Kids: Srotek Collapsible Kids Water Bottles at Amazon
"As fun for kids to use as it is practical for parents to schlep."
Our Top Picks
Best Overall: Baiji Bottle Collapsible Silicone Water Bottles
This handy two-pack of collapsible water bottles, made from food-grade silicone, makes a great pick if you want some on rotation for your travels and your workout classes (or split it with a friend). The water bottles are both rollable and foldable, plus they have a metal carabiner and retainer for clipping onto gym bags and backpacks if you're heading out to a hike or exercise class. Once unrolled, the bottles are designed to stand up unaided on their own, even when they’re not totally full — just be sure to keep it upright if you’re freezing it. Throw a bottle in the freezer to keep up to 20 ounces of water icy cold for hours, and then just fold it up when you’re ready to store it. Plus, a portion of all sales goes towards a dolphin rescue and protection program.
Best Design: Mountop Collapsible Silicone Water Bottle
With colors like icy blue and millennial pink (or just black), this collapsible water bottle rolls up to save space on the go — and, how stylish is this unique shape? The food-grade silicone is safe to drink from, won’t retain any funky flavors, and it won’t break easily, thanks to its high-quality construction. And despite what you might think, it stays standing up no matter how much you drink from it — just “break” its shape and roll the bottle up yourself (and there’s a handy rubber band to help secure it when you do). It’s freezable, so you can fill it up and throw it in the freezer for chilled water when you need it most. Throw it in the top rack of the dishwasher to clean it, and the company recommends a periodic 24-hour soak in lemon water for “maximum freshness.”
Best Lightweight: Platypus Platy 2-Liter Water Bottle
Weighing just 1.3 ounces when it’s empty, this well-made water bottle unrolls to fold up to 2.1 liters of water, meaning you’ll never be dehydrated on your next hiking or camping trip. It’s made from food-grade polyethylene lining that doesn’t taste like plastic (or retain the flavor of anything else you might have filled this up with), and it’s BPA-free. It stands up easily on its own when it’s filled with water. If you’re really into it, you can swap out different Platypus caps, or integrate it with the Platypus GravityWorks water filtration system. Rest assured that this is one well-made water bottle: it’s highly durable and, most importantly, the cap creates a wonderfully tight seal to avoid leaks. The bottle is clear, too, so you can easily keep an eye on your water levels to make sure you’re drinking enough — or pace yourself if you’re on the trail for a few hours.
Best for Backpacking: Nomader Collapsible Water Bottle
Not only does it roll up for travel (making it easy to justify a second one if you’re heading out on a multi-day backpacking trip), but this water bottle loops around your wrist, making it easy to keep water on hand without having to grip it for hours or take it out of your backpack. Plus, thanks to its durable food-grade silicone body, it’s shatterproof — so even if you accidentally drop it on the trail, your bottle will stay intact. It also handles hot or cold drinks, and once you’re back, you simply throw it in the dishwasher for a thorough clean. We also like the spout cover that keeps the mouthpiece clean when you’re not using it.
Best for Hot Liquids: HydraPak UltraFlask 500 Water Bottle
If you like to bring some hot tea with you for after yoga, HydraPak’s UltraFlask 500 is one of the few collapsible water bottles that also does double-duty by carrying hot water, too (it can hold water up to 140 degrees Fahrenheit). On the flip side, you can also freeze the bottle to keep liquids cold. Because there’s no BPA or PVC used in the bottle construction, you don’t have to worry about dodgy chemicals interfering with your hydration. It has a relatively large opening, which is super-helpful for filling up the bottle without it spilling everywhere, and you can either add or remove the bite valve on the cap for easy opening. It weighs just 1.4 ounces when it’s heavy, so be assured that this bottle won’t slow you down — rather, you can tuck it in your hydration vest for streamlined water on the go.
Best with Case: HYDAWAY Hydration Travel Pack
When traveling with a water bottle, it’s hard to control what it touches when it’s not in use: over the course of a day, a bottle can shift around as you go about your errands, so it’s hard to predict what exactly the mouthpiece is going to come into contact with (dirty socks in your gym duffel? The crumb-filled bottom of your tote bag?) While it’s never a bad idea to wash a bottle once you’re done using it, having a travel bag (like this HYDAWAY one) ensures that the mouthpiece isn’t going to touch anything that’s not clean. Plus, the case comes with a carabiner, so you can clip it on to your favorite day bag to remind yourself to stay hydrated. The bottle is also protected by a one-year guarantee in case anything goes wrong. Once you’re ready to wash it, just pop it in the dishwasher.
Best FDA-Approved: Kemier Collapsible Silicone Water Bottles
If you want to be extra sure that the water bottle you’re drinking out of is definitely safe, look no further. Kemier’s collapsible 750-ml bottle (that’s enough to hold a bottle of wine) is made from 100-percent medical-grade material that’s been greenlit by the FDA. And, it’s practically guaranteed to be leak-proof: hold it upside down, and you won’t see a single drop spill out, thanks to a special valve design that reveals the mouthpiece via a one-touch switch (and a lock ring so the bottle doesn’t accidentally open bouncing around in the bottom of your tote or gym bag). We also love the wide-mouth design on the bottle, which makes it easy to clean or fill up with ice. Better yet, it’s designed for easy travel, with a carabiner that attaches to the top that can hook on to your pack or duffel.
Best for Kids: Srotek Collapsible Kids Water Bottles
With a fun orange-and-green colorway, this bottle is as fun for kids to use as it is practical for parents to schlep, making it pretty much ideal. There are plenty of ergonomic places built in for kids to rest their hands and grip the bottle, and they can even tote it themselves thanks to the detachable carry strap — even more, it’s specially designed for kids ages 4 to 12 years old. The material is safe for them to drink from too, as the bottle is made from 100 percent medical-grade material, and it’s built to be anti-backflow and anti-drowning proof, thanks to a cross-flow design on the opening. And when they’re done, they can just roll it up and tuck it in their backpack. When you’re ready to sterilize it, the body is easily deconstructed and you can sterilize key parts in boiling water or microwaves.