USN Shaker features a screw top lid allowing it to stay very tight without any leaking at all. It comes with a pop of top for easy access and convenience. This product also features a mesh mixer inside rather than a wire ball. As you shake, the mesh top will help keep your protein shake clump free. USN Mega Shaker is easy to clean too. Take the lid of and clean inside with nice warm soapy water, it’s as easy as that. Anything you’ve had in will wash away.