Can be used individually or with other mixing bowls. Compatible for use with electric alginate mixers. For quick and easy mixing without the messy clean-up. Dispos-A-Bowl Mighty Mixer Bowls are disposable mixing bowls made of fine, recyclable plastic. The material allows for easy handling while ensuring a tight fit into the mixing bowl without slippage. With their freestanding characteristic, these bowls can be used with or without a mixing bowl and are compatible with electric alginate mixers. Impression Bowls are ideal for quick and effective mixing of alginate, stone, and plaster, eliminating messy and time-consuming cleanups. Each bowl measures 4-7/8" Diameter x 3-1/8".