This case holder is a combination of 2 cups, which can be used as a washing cup, and can also store toothbrush / toothpaste / towels. It's a sturdy toothbrush holder that won't break easily if it falls to the ground. You can use it as a water cup because it is so lightweight. This case holder made of food-grade PP material, portable and easy to carry, suitable for travel / business travel / hiking, and camping.