Chef'n SleekStor Pop + Pour Mixing Bowl Set (Arugula and Meringue) Measure and portion wet or dry ingredients with this measuring cup set. Pop up the natural-hold handles on the 2, 3 and 4-quart size bowls to grip and pour a steady stream of wet or powdered ingredients. Fold the handles to the side and nest the bowls for convenient space-saving storage. Constructed of durable nylon with a non-slip base, these bowls will not slide or slip on the countertop. Each bowl is top-rack dishwasher safe, but not safe to use in the microwave.