Narrow Mouth Straw Lid
Water Bottles

Narrow Mouth Straw Lid

Our narrow mouth straw lid collection was made for those who prefer to effortlessly sip on their drink, whether that’s using the straw lid or one of the extra lids. Drink in style either way.

About Iron Flask

We love helping people stay hydrated. That’s why we design our water bottles to look cool and function flawlessly. With premium stainless steel, double-wall vacuum insulation, and features, sizes, and colors for everyone, Iron Flask puts the “fun” in “fundamental fluid.” We like the straw lid for its low-key sippability, but you’ll also find a flip-top lid and a leak-proof screw-on lid with a comfy carry handle in the box, so feel free to switch it up.

Stainless Steel Water Bottles

We craft our water bottles to last for the long haul. With 18/8-grade, powder-coated stainless steel that won’t transfer flavor and non-toxic, BPA-free plastic straw lids, Iron Flask narrow-mouth bottles make single-use plastic bottles a non-option.

Vacuum-Insulated Water Bottles

Double-wall vacuum insulation creates a protective barrier around your drink, keeping it warm for up to 12 hours or cold for up to 24. Keep your beverage as hot, cool, or somewhere-in-between as it started.

Narrow-Mouth Water Bottles

Narrow-mouth water bottles have a smaller opening, so they’re easy to drink from on the go. Use one of the included lids to customize your sipping and your schlepping.

Water Bottle Accessories

Take a peek at our water bottle accessories, too. We have protective boots, cleaning brushes, and more to keep your water bottle primed for action.

Water Bottle Warranty

Iron Flask is committed to the highest quality standards and we back it up with a lifetime warranty against manufacturing defects and a 100% satisfaction guarantee on all of our products. We help you stay hydrated, while you help the planet stay healthy.

One for Everyone

One for Everyone

Iron Flask has become a favorite of many because of our strong, durable, and affordable double-wall vacuum insulated, stainless steel, reusable water bottles. Our Iron Flask is ...

The Ocean Thanks You

The Ocean Thanks You

The Goodness of Your Vacuum Insulated Stainless Steel Water Bottle If you are the proud owner of an Iron Flask, thank you and congratulations, you are hydrating in style. Consid...

Top Advantages of Drinking a Gallon of Water Every Day

Top Advantages of Drinking a Gallon of Water Every Day

Everybody knows the health benefits of drinking water, including better athletic performance, vibrant, glowing skin, good digestion, and much more. But putting it into practice ...