Surpahs Superior Nested Mixing & Prep Bowl Set of 4 Bowls w/Color Matched Complementary Lids [Improved] Heavy-duty 4 mixing bowls nestle into one another even with the lids on for multipurpose and space-saving easy storage under the cabinet or on countertops. From medium to extra large sizes: 7-1/2", 9", 10", 11-1/2". Thick & durable construction, chip & stain resistance. Non-slip gasket on the bottom of each bowl provides improved grip and surface protection. Made of Melamine, FDA Approved, BPA Free, safe to serve food Stylish wave pattern design makes beautiful house warming gift, outstanding potluck showcase, and fresh look to both contemporary and traditional kitchen. Bowles (but NOT the lids) are top rack dishwasher safe. Not using in the microwave or oven. High-end quality. Beyond the Amazon's A-Z protection policy, you are backed by Surpahs 100% satisfaction guaranteed program, welcome to compare.