Narrow Mouth Straw Lid

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.

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.

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 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.

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.

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.