Introducing the first insulated Sport Cap designed specifically for your Hydro Flask, perfect for one-handed refreshment on the go. 

• insulated for enhanced temperature protection
• unique ergonomic design and superior flow rate
• soft silicone spout with a quiet, “no-whistle” valve
• BPA-Free and Phthalates-Free
• Lifetime Warranty

Works with all the Standard Mouth Hydro Flasks.