Most wide-mouth bottles are easy to fill and clean, but the standard opening is too big to drink from without spilling. Narrow-mouth bottles are great to drink from but you can forget about putting ice cubes in them, let alone cleaning them. And bottle inserts don't really fix a spout that was never meant for daily drinking. capCAP is the civilized 2-in-1 accessory cap designed to work with Nalgene, CamelBak, and most other popular wide-mouth drinking bottles. The new, re-designed capCAP+ is also compatible with Hydro Flask wide-mouth, Nalgene Stainless, and Guyot Stainless. 

• 100% BPA-free, polycarbonate-free, and phthalate-free.
• Drink spill-free through the small spout, and then clean and fill easily with the large cap.
• Wide, rounded strap makes bottle comfortable to hold 
•  CapKeeper holds the small cap out of the way when drinking
• Caps are made with FDA-approved, food-safe polypropylene (#5) plastic.
• Caps are covered by a lifetime warranty
• Machine wash
• Imported