Fits snugly into the neck of the bottle Your beverage pours out in a nice controlled flow Easy to pop out for cleaning or filling your bottle Dishwasher safe Fits Nalgene 32 oz Wide Mouth bottles only Most people love the convenience of the wide mouth bottle when it comes to filling and cleaning, but sometimes find it hard to drink from. The Easy Sipper solves that problem. Fits snugly into the neck of the bottle. Your beverage pours out in a nice controlled flow. Easy to pop out for cleaning or filling your bottle. Dishwasher safe. Fits Nalgene 32 oz Wide Mouth bottles only.