1. DURABLE STRAW LID FOR STANDARD MOUTH - Straw lid with straws is a great choice of replacement lid for hydroflask standard mouth. Durable handle, easy to carry, no worry about dropping your hydroflask with straw lid standard mouth. 2. STRAW LID EASY TO USE: Super easy to open, while latching closed securely. Allows one-handed drinking, easily flip straw top and sip water from straw lid, perfect for indoor and outdoor sports, camping, hiking, etc. Wider finger loop is comfortable to carry your flasks anywhere. Popular water bottle lid accessories to meet daily hydration on the go. 3. COMPATIBLE WITH HYDRO FLASK STANDARD MOUTH - Straw lid fits Hydroflask standard mouth 18 21 24 oz (mouth diameter 1.91"). This standard mouth straw lid also fits Simple Modern Ascent, the Coldest Water Standard Mouth, Klean Kanteen Classic Bottle. REMIND: Not for WIDE MOUTH hydroflask 12 or 18 oz, ONLY for hydroflask STANDARD MOUTH / SMALL MOUTH. 4. GOOD VALUE - Comes with 2 Straws and 1 straw cleaner. Standard mouth straw lid is made of high quality BPA free material, durable straw cap will last for years. Safe and easy to use for both adult and kids. Select this popular style sport cap as replacement lid for hydroflask standard mouth is a great choice.