Stay Hydrated with Custom Hydro Flask Standard Mouth 21 oz Bottles with Flex Cap Your perfect travel companion. Keep life moving with the Hydro Flask Standard Mouth With Flex Cap 21oz. It stashes easily into a small shoulder bag, your pack’s side pocket, or your car cup holder, and holds enough ice-cold goodness to keep you going for hours without weighing you down. No wonder it's one of our bestselling water bottles. TempShield insulation eliminates condensation and keeps beverages cold up to 24 hours and hot up to 12 hours. BPA-Free. 21oz. Hand wash only. TempShield double-wall vacuum insulation keeps drinks cold up to 24 hours, hot up to 12 Flex Cap is leakproof when closed Honeycomb Insulated Cap for maximum temperature retention Made with 18/8 pro-grade stainless steel for durability, pure taste and no flavor transfer Color Last powder coat is durable, sweat-free and colorful BPA-Free | 24 Custom Promotional Logo Hydro Flask Standard Mouth 21 oz Bottle with Flex Cap