I'm only writing this review to stop the weekly emails that I receive from Amazon to review this product. It's a cup or tumbler what ever you want to call it. It's open at the top and closed at the bottom. You can fill it with whatever you want. It doesn't leak and works fine. My wife keeps her tooth brush in it, it works fine for that too. It amazes me that Amazon wants a review on the most common items. They also want me to review batteries that I ordered. How about keeping reviews to more functional items.