The 100% leakproof Flip Seal Sport Cap comes with an ergonomic spout that opens and closes with just a flick of the thumb and can be used with or without the included stainless steel straw for maximum versatility so you can stay hydrated your way. Includes special telescoping straw to fit various size bottles. Compatible with Classic bottles only (with internal threads).

• 100% leakproof
• Easy open spout
• Ergonomic design with steady flow rate
• Can be used with or without internal stainless steel straw
• Compatible with all Single Wall and Vac Classic bottles
• Dishwasher safe
• BPA Free