The Hydro Flask 32 oz Wide Mouth with Flex Straw Black is a double-walled thermal bottle with TempShieldTM vacuum insulation. It keeps your tea or coffee hot up to 12 hours and cold beverages icy for up to 24. The bottle is crafted with a rugged, durable construction ready for any outdoor expedition. It is made of durable 18/8 Pro-Grade Stainless Steel construction with a wider opening and is BPA-Free and Phalate-Free. The durable, sweat-free powder coat finish adds a better grip and more durability.