The Hydro Flask Wide Mouth with Straw Lid is big enough for all-day hydration. A wider opening means faster fill-ups while the Straw Lid ensures easy sipping. Thanks to its double-wall vacuum insulation, your cold drinks stay ice cold for 24 hours and hot stays hot for 12 hours, so you can stay refreshed for any adventure. Straw Lid is leakproof when closed for worry-free transportation TempShield double-wall vacuum insulation ensures contents stay the perfect temperature 18/8 pro-grade stainless steel for durability, pure taste, and zero flavor transfer Proprietary Color Last powder coat keeps bottle slip-free and colorful — plus it's dishwasher safe Summer 2022 product Equipped With TempShield TempShield is Hydro Flask’s innovative double-wall, vacuum insulation, which protects the temperature of its contents and eliminates condensation. TempShield keeps liquids cold up to 24 hours and hot up to 12 hours.