Available in myriad size and color options (6 of the former and 23 of the latter), the double-insulated Iron Flask water bottle really does have something for everyone, no matter your age, body type, or budget. Ranging from a modest 14 ounces to a bladder-busting 64 ounces, each water bottle comes with three different lids for swapping between hot and cold beverages. Yep, the Iron Flask is rated to keep cold stuff cold for up to 24 hours, and hot stuff hot for up to 12.

The double-walled insulation is meant for any liquid temperature; according to the company, it’ll keep drinks ice cold for up to 24 hours, or piping hot for up to 12. When I tested out the bottle’s insulation, its internal temperature dropped from 176 to 118 degrees Fahrenheit when left alone overnight. Conversely, the temperature rose from 35 to 54 degrees under the same conditions when I tested the bottle with cold liquids. Air dry your bottle and remember to clean around the lid, washing and drying the bottle separately to the lid. More From Tom's Guide If you're trying to be more mindful in your water bottle choices when choosing the best water bottle for workouts, consider glass. Stainless steel bottles are also proving popular, and both options are safe, durable, and toxin-free. What is the safest water bottle to drink from?

The stainless steel exterior is simple and elegant, yet built for some abuse; it’s designed to keep drinks hot for 12 hours, or cold for 24. Other color options are available, but they’re a lot more muted than what you’ll find with other water bottles.

Durable and Safe: Made from food-safe PET plastic, it’s free from harmful chemicals and built to withstand the rigors of your daily activities. Jocelyn Ivanov, MIT, Drinking fountains: the past and future of free public water in the United States, September 29, 2015 Best treadmills | Best adjustable dumbbells | Best home gym equipment | Best resistance bands | Best foam rollers | Best yoga mats | Best weighted jump ropes | Best smart scales | Best shoes for Peloton and indoor cycling | Best protein shakers

The Best Insulated Sports Water Bottles

Jon Hamilton, Beyond BPA: Court Battle Reveals A Shift In Debate Over Plastic Safety, NPR, February 16, 2015 Jenna Bilbrey, BPA-Free Plastic Containers May Be Just as Hazardous, Scientific American, August 11, 2014

Johanna R. Rochester, Ashley L. Bolden, Bisphenol S and F: A Systematic Review and Comparison of the Hormonal Activity of Bisphenol A Substitutes, Environmental Health Perspectives, July 1, 2015 Smaller water bottles might only hold 12 ounces or liquid (or less), which is great if you plan on taking yours on daily jogs. Others are built like tanks and are great for hardcore camping expeditions. Or maybe you’re just looking for a water bottle to keep by your desk while you work. Think about how you plan to use the water bottle before settling on a size. Mouth and cap style Many of the best water bottles, especially those that are insulated, have some heft to them, and are made from durable stainless steel; this allows for some models to handle both hot and cold drinks with aplomb. Budget-priced bottles are usually made from plastic — which makes them a lot lighter, too, which makes them more suitable for runners or bikers. Bells & Whistles And for pre or post-workout hydration, you'll need our protein shakers to help mix up the perfect sports shakes and smoothies. The Best Stainless Steel Sports Water BottlesAccording to research, approximately 75% of Americans are chronically dehydrated, which can cause fatigue, weakness and loss of stamina. This equates to about 3.7 liters for men and 2.7 liters for women, according to the U.S. National Academies of Science, Engineering and Medicine.So, we're not drinking enough, but how do we fix it?

Metal bottles made from stainless steel or aluminum are also safe, but each material comes with its own pros and cons, from how durable they are to how easy your bottle is to wash or how heavy it might be. Yep, even water bottles have built-in tech these days. You might have to spend a little more coin, but a variety of premium water bottles include customizable lights (they’re actually cooler than you’d think), smartphone app connectivity, and even built-in water purification. Some bottles have swappable caps and/or built-in straws, and those aimed at the fitness sector often include a carrying pouch of some kind. How we tested the best water bottles Glass prevents anything unwanted from getting into your fluids, and most plastic bottles are classified as BPA-free. However, rememeber to wash your bottles regularly to keep them safe and clean. This is a great place to start, since you’ll be toting this thing all over the place. Or will you? Some water bottles were built for mobility, while others are better suited for tabletop use. (Or the floor of a tent.) The best water bottles have lots of color options to choose from, so if you’re looking for a gym accessory to match your personal style, you’re bound to find something you like amongst the slimmer models. Size and Liquid CapacitySome of the best water bottles on this list also make for a great thermos, and the Hydro Flask might just be my new favorite road trip companion. Constructed from 18/8 stainless steel, this water bottle is dishwasher safe, so you don’t need to worry about squeezing your hand through the narrow mouth to clean it. The slim, leakproof design of the 24-ounce model is also the perfect size for cup holders in just about any vehicle. Bottom line: whether you need it for coffee or Kool-Aid (or neither), the Hydro Flask is one of the best water bottles for your next road trip. Leak-Proof Design: The silicone seal ensures that you won’t have to deal with messy leaks or spills, allowing you to carry your water bottle with confidence.