Straw Lid for Hydro Flask Standard Mouth Water Bottle. New and Improved Design Replacement Cap for 1.91" Mouth Insulated Water Bottle 12 oz, 18 oz, 21 oz, 24 oz.
New and Improved Design: State of the art double wall structure design, patent pending. Our standard mouth straw lid is truly a revolutionary upgrade for your beloved Hydro Flask, Simple Modern Ascent, or any Stainless steel water bottle with the standard mouth size of 1.9" in diameter.
Inspired by Nature: Double wall structure creates a vacuum to keep your water cold or hot. Our new improved design outperforms other brand's straw lid in terms of insulation by up to 100%.
Absolutely Leak Proof: No more accidental drips that damp your bag or wet your books. Once you closed our straw lid properly, you can rest assured that it will not leak even laying down in your backpack.
Polished Large Round Handle and Mouth Piece: Easy to carry, and easy to drink from. Our unique oval shape mouth opening gives you the joy of drinking with the maximum flow of water, effectively reduce annoying sipping sound.
BPA-Free Guarantee: Made with food grade BPA free plastic and silicone, it will not create any unpleasant flavors to your drinks. You can trust it for your daily cold and hot beverage intakes.