capCAP is the civilized 2-in-1 accessory cap for Nalgene, CamelBak, and other popular wide-mouth drink bottles. Most wide-mouth bottles are easy to fill and clean, but the standard opening is too big to drink from easily 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 offers the best of both worlds. Drink spill-free through the small spout, and then clean and fill easily with the large cap.Opening measures 63mmRubberized small cap is easy to grip, even with gloves onWide, rounded strap is comfortable to hold onto100% Polycarbonate-free100% BPA-freeMade with FDA-approved, food-safe polypropylene (#5) plasticDishwasher safe (top rack only)Compatible with: Nalgene 1L including HDPE, Tritan, and PCCompatible with Nalgene On-the-Go, including Everyday, Tritan, and PCAlso compatible with Nalgene SS, Guyot SS, Cyclone (PC) and all CamelBak Better bottles