This lightweight bottle features a sleek, stylish design that comes in almost 40 colors and patterns, from solid hues to botanical prints. We love that it's leakproof, with a secure, screw-on lid. Available in three sizes (9 ounces, 17 ounces, and 25 ounces), the narrow silhouette makes this bottle easy to carry with you, sliding in most bags and cupholders with ease. Like Corkcicle's Canteen, S'well's Water Bottle features triple-walled insulation—perfect for keeping your tea or coffee hot all morning long. The brand claims the largest bottle can keep drinks cold for up to 48 hours and hot for around 18. While we didn't test the full extent of this range, the bottle did perform well in our temperature tests, keeping our water fresh and cold after three and six hours.

Single-walled insulation means the bottle is made from a single layer of stainless steel. You won't find any single-walled bottles on our list because they don't stabilize temperature very well, meaning your water won't stay cold over time.

What to look for in a reusable water bottle

To help you stay hydrated, especially during busy days, we recommend investing in a functional water bottle that you can bring with you to the gym and the office. Stainless steel water bottles keep your water cold for hours, are better for the environment than plastic, and aren’t prone to breaking like glass water bottles can be.

We liked that Hydro Flask's 24 oz Lightweight Trail Series Water Bottle has a convenient handle and a sleek silhouette that fits in most cupholders. However, when we dropped it, the lid almost flew off, and the slippery, shiny finish was tough to hold. We were initially impressed by MIRA's 17 Oz Stainless Steel Vacuum Insulated Water Bottle because of its leakproof seal. But it dented easily, and its heavy weight made it uncomfortable to hold.When looking for a stainless steel water bottle, choose one that's well-insulated, in a size that's convenient for you. We researched and tested some of the most popular stainless steel water bottles on the market to find out which ones are truly the best. We also tapped experts, including Todini, for their opinions on which features set the top water bottles apart.

Made from 18/8 pro-grade stainless steel, this Hydro Flask is BPA-free. But while it kept our water cold for three hours, we noticed the temperature had increased by 8 degrees after six hours—meaning this bottle's double-walled insulation isn't effective as others we tested. If insulation is important to you, we recommend investing in Takeya's Actives Water Bottle or Thermoflask's Water Bottle instead. Lainey Younkin, MS, RD, LDN, is a registered dietitian always looking for ways to help her clients drink more water. She has personally owned many stainless steel water bottles because she can’t stand lukewarm water and loves any bottle that keeps her H20 ice cold for hours. The wide mouth opening allows us to add ice cubes, while the spout lid ensures we can sip without soaking our shirts. Combined with the handy carrying loop, we recommend this bottle as your everyday go-to, especially if you work out often and need a basic bottle for the gym. The bottle's slim design is easy to hold and fits in most cupholders. This, combined with the handy carrying loop that's attached to the lid, enables us to bring this bottle almost anywhere. to 4.7 stars: These stainless steel water bottles are excellent—they might have minor flaws, but we still recommend them.Drinking enough water has plenty of benefits: “Staying hydrated is key for not only your body’s performance, but also mental clarity and productivity," explains Krista Todini, RDN, a registered dietitian nutritionist. Although the exact amount you should be drinking varies, it's safe to say that adding another glass or two to your daily routine is a good idea for most people.

We often test water bottles in the Verywell Testing Lab. To find the best stainless steel options, we first research dozens of popular models from the most trusted brands. We also ask experts like Kristina Todin, RDN, a registered dietitian nutritionist, for her advice on how to shop for a stainless steel water bottle that's both functional and durable. While this bottle keeps our water cold for hours, preserving ice cubes overnight with ease, Owala notes that it's not meant to hot hold beverages. Instead, we recommend S'well's Water Bottle for your tea or coffee.and below: We don't recommend stainless steel water bottles with this rating; you won't find any on our list. Water Bottles We Also Tested For a stainless steel water bottle that comes with a filter built in, we love this option from Brita. It filters out unpleasant tastes and odors, for fresh-tasting water with every sip. We like that the filter is included at a similar price to most other bottles on our list (although you'll need to replace it regularly to reap the full benefits, according to the brand). to 5 stars: These are the best stainless steel water bottles we tested. We recommend them without reservation. The double-walled insulation kept our water icy cold. Thermoflask notes that the bottle will chill drinks for 24 hours or keep them hot for 12, making it a solid choice for your morning coffee or tea. The attached handle is easy to hold, although we wish it could be folded down when not in use. The 64-ounce Iron Flask Water Bottle is our favorite large capacity option if you want to space out your refills. (However, we also stand by the other five sizes if you're in the market for something smaller.) We love that it comes with three different caps: a straw lid with a carrying loop, a flip lid, and a stainless steel cap that covers the bottle's wide mouth opening.