This soft silicone cap is suitable for use with Wow Cup® leak-proof cups. All leak proof cup models are interchangeable.
This product includes 3 piston caps of the same color. The piston cap can be used in combination with other color cap rings and leak-proof cups to create different color combinations.
The product is also very suitable for families with multiple children, it is convenient to assign different colors of leak-proof cups to each child. Kids can get more fun by mixing the piston cap and the Wow Cup leakproof cup