Designed with new durable material and a soft-feel silicone mouthpiece, simply slide the button and the mouthpiece will flip up for easy and one-handed hydration. 

• Universally fits all frank green bottle sizes.
• Slide the button to release the mouthpiece.
• Made from new extra durable copolymer material.
• Soft-feel silicone mouthpiece for comfort. 
• Perfect for gym days or nail salon days!