Wide-mouth bottles are easy to fill and clean, but sometimes difficult to drink from. The Easy Sipper solves this problem, snapping snugly over the top and dispensing your beverage in a controlled flow. Features: Improves drinking control - provides a smooth, controlled flow from wide-mouth bottles. Snug fit - snaps securely over the bottle opening for a tight, reliable seal. Easy to use - simple to attach and remove as needed. Compatible with wide-mouth bottles - designed to fit most standard wide-mouth bottle designs. Convenient design - makes wide-mouth bottles easier to drink from without spills. Easy to clean - can be removed quickly for thorough cleaning or refilling. Specs: Weight - 3.5g | 0.1oz Dimensions: 2 in x 0.25 in | 5 cm x 0.6 cm What's included: One Nalgene - Easy Sipper