Standard Straw Lid for Hydro Flask and Simple Modern Ascent Water Bottles. 1.91" Sports Bottle Top Cap Fit for 17oz, 18oz, 21oz, 24oz Klean Kanteen Classic Mouth Bottle This lid comes with two straws, one brush, and a carabiner. We made the straw extra long on purpose, which enables you to trim the straw to fit all types of bottle sizes, both short and long. Our standard mouth straw lid is truly a revolutionary upgrade for your beloved Hydro Flask Standard Mouth, Simple Modern Ascent, TOPOKO standard mouth, or any stainless steel water bottle with the standard mouth size of 1.9" in diameter. State of the art double-wall structure design, TOP QUALITY silicon straw on the market, patent-pending. A double-wall structure creates a vacuum to keep your water cold or hot. Our new improved design outperforms other brand's straw lids in terms of insulation by up to 100%. Absolutely leakproof, 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. The brush makes it easier to clean the straws. And you can carry your beloved water bottle everywhere by clip it to your backpack with our lid and carabiner. Easy to carry, and easy to drink from. Special patent structure and easy carry handle make it perfect for physical and outdoor activities, as well as day to day tasks. Our unique oval shape mouth opening gives you the joy of drinking with the maximum flow of water, effectively reduces annoying sipping sound.