Precise Portions Dishwasher-Safe Portion Control Bowls These white porcelain bowls are as beautiful as they are functional. Use them to make soup! These bowls are all microwave-safe. Each porcelain ceramic bowl doubles as a measuring bowl. The measuring lines on the bowls are extremely discreet, so you can control your portions wherever you are. Clean-up is easy too  these bowls are dishwasher-microwave safe.