Norpro bowl comes with silicone bottom to keep the bowl from moving around on the countertop while mixing kneading or whipping food you can easily mix all your favourite ingredients and foods and need not to worry about the bowls will wobble when mixing beating and whipping Set nests for easy storage and convenience a functional set that saves you space. These bowls seamlessly nests together creating an uncluttered and organized effect in your cabinets while saving space. Bowl sizes also fit on your standard size refrigerator shelf cabinets and pantry perfect for as a housewarming or wedding gift.