I hated when my sponge would get all dried out every day and my water jar would evaporate leaving nasty rings and all sorts of dust would fall into my clean water. If you have dealt with this, you will feel so happy using this jar. The Porcelain Sponge Jar by Black Diamond Innovations is a patent-pending glass jar with a genius articulating lid. When not used, the closed lid stops evaporation and dust from falling into your water. The lid design allows you to store up to two brushes and when opened, articulates to the desktop exposing a perfectly moistened shaping sponge. Compact and efficient. Comes with two sponges, one yellow and one blue.