We craft our water bottles with double-wall vacuum insulation and premium stainless steel. This technology keeps your beverages cold for 24 hours and hot for 12 hours while standing up to any abuse that may come its way

Insulated Stainless Steel Water Bottles

Explore our selection of premium Iron Flask water bottles, which include vacuum-insulated and insulated stainless steel designs that help maintain your drinks at the optimal temperature all day long. Ultra-durable materials make our bottles easy to clean – they never rust or impart metallic flavors to your drink of choice. Instead, you’ll enjoy tasty, convenient, and stylish sipping wherever your day might take you.

We offer a wide range of environmentally friendly bottles in a variety of fun styles and sizes that are perfect for use at home, in the office, or on your next adventure.Our bottles are also adaptable and long-lasting for children to use on playgrounds and other outdoor activities. From little league games to family hikes, Iron Flask has you covered.

Features of Our Stainless Steel Water Bottles

From the large one-gallon to our convenient narrow mouth bottle design, Iron Flask’s five water bottles are designed to suit every individual’s drinking needs:

  • Double-walled vacuum insulation keeps exterior dry
  • 18/8 high-grade, non-toxic stainless steel
  • Powder-coated finish for durability

Wide Mouth Bottles

Our wide mouth water bottles are popular for those who prefer to gulp or chug rather than sip. The convenient design allows you to add ice effortlessly and thoroughly clean your bottle after use. Each bottle ships with three 100% leak-proof lids: a straw lid, a flip lid with handle, and a stainless steel screw-on lid. Size options include 14 oz, 18 oz, 22 oz, 32 oz, 40 oz, and 60 oz. 

Narrow Mouth Bottles

The Iron Flask narrow-mouth water bottles are made to keep beverages cold for up to 24 hours and hot for up to 12 hours. Perfect for taking your favorite beverage on the go, our narrow-mouth water bottle features a leak-proof spout lid for mess-free drinking and precise pouring. Each comes with a flip lid and a handle lid for added convenience on your adventures. Size options include 12 oz, 16 oz, 20 oz, 24 oz, 32 oz, and 64 oz.

One-Gallon Bottles

One-gallon water bottles make meeting your hydration goals a breeze holding 128 oz of your favorite beverage. The thoughtful design allows you to sip your drink effortlessly. This vacuum-sealed bottle can keep your drinks cold for up to 24 hours and hot for up to 12 hours. One spout lid included with purchase. Size options include half gallon and one gallon bottles.

Retro Bottles

Retro water bottles blend old-school aesthetics with contemporary functionality. Our vintage-inspired retro water bottles have a sleek, classic shape and keep your drinks hot for up to 10 hours, cold for up to 24 hours. Each comes with a bottle brush for easy cleaning. A leak-proof screw-on lid is included. Size options include 17 oz and 25 oz bottles.

Kids Water Bottles

Our kid’s water bottles feature a leak-proof straw lid with a carry handle, and vacuum insulation that keeps drinks cold for up to 14 hours. These water bottles even come with name stickers for personalization. Made from 18/8-grade stainless steel, the Kid’s water bottle is durable and doesn't add metallic taste to your drinks. Available in both 10 oz and 14 oz sizes.


Are Stainless Steel Water Bottles Safe To Drink From?

Stainless steel is a durable, non-toxic material that does not leach harmful chemicals into the water, unlike some plastic bottles. Additionally, stainless steel is resistant to corrosion and can keep your water cool for longer periods. So long as you regularly clean and maintain your Iron Flask water bottle, it will be good to use for years to come.

How Do I Choose a Stainless Steel Water Bottle?

When you’re in the market for a stainless steel water bottle, it’s important to look for options made from 18/8 high-grade, non-toxic stainless steel. These numbers ensure that the bottle is safe for drinking. Our water bottles are safe to use at any temperature and never release any chemicals into your beverage, even if the bottle becomes scratched or aged.

Do Vacuum Insulated Bottles Work?

An insulated stainless steel water bottle is a powerful thing. They consist of two layers – one on the interior and one on the exterior – with a layer of insulation in between. This means that heat is not conducted out of the container, but directed toward the hot liquid inside.

In this way, vacuum-sealed bottles help retain the heat where it is desired, ensuring that your drinks stay warm without causing the exterior of the bottle to become hot to the touch.

Additional Information

About Iron Flask

From the concrete jungle to the great outdoors, Iron Flask makes it easy to bring your bevvie along for the ride. We designed our water bottles to keep up with active lifestyles—that means premium stainless steel, double-wall vacuum insulation, eye-popping colors, and a range of functional features. Sizes range from 12 to 128 oz.

Stainless Steel Water Bottles

Iron Flask water bottles feature high-quality stainless steel with non-toxic, BPA-free plastic lids. They’re an awesome alternative to single-use plastic bottles, which hurt the environment and can literally leave a bad taste in your mouth. A powder-coated finish gives these flask water bottles a modern matte look that holds up to everyday wear and tear.

Vacuum-Insulated Water Bottles

Double-wall vacuum insulation keeps liquids warm for up to 12 hours and cold for up to 24 hours. With Iron Flask, all you taste is your drink, at the temperature you want to drink it. Here’s to piping hot coffee and ice-cold water on the go.

Water Bottle Shapes & Sizes

Our 14 oz, 18 oz, and 22 oz water bottles are cup holder-friendly, but they also come in 32 oz, 40 oz, and 64 oz versions if you need a bigger bottle.
Be sure to check out our best-selling wide-mouth water bottles—their wide mouth makes them easy to fill-up and they come with three different leak-proof lids for you to switch from. The 14 oz, 18 oz and 22 oz versions fit into most car, bike, and backpack cup holders, or you can opt for the larger 32 oz, 40 oz, 64 oz and one-gallon bottles if you need lots of water.

Water Bottle Lids & Accessories

Our wide mouth and narrow mouth water bottles come with a straw lid or a spout lid, plus two additional lids at no extra cost, so you can choose the right top for the activity at hand. The straw lid delivers cold water or a refreshing sports drink right to your mouth in the most sophisticated way—no squeezing or neck-craning required. The spout lid provides a quicker quench on the go. Both feature a 100% leak-proof design. Whether you choose a straw–lid or spout-lid bottle, you’ll also get a bomb-proof stainless steel screw-on lid and a flip-lid with a slip-free handle for care-free carrying.

Our accessories, which include paracord handles, extra lids, and cleaning brushes, ensure you’ll get the most out of your Iron Flask water bottle. We also offer a protective boot which fits 12 oz- 24 oz bottles, and a larger boot for the 32 oz- 64 oz sizes.

Water Bottle Warranty

We stand behind the quality of our products, and we offer customers a lifetime warranty and a 100% satisfaction guarantee on everything we make. Let’s take care of your health and the earth!