304L (18/8) Antibacterial Stainless Steel, non-toxic, corrosion resistant, antibacterial. Lab results show 99% resistant to Staphylococcus aureus and Escherichia coli. High rim is designed to prevent child’s mouth to come in contact with plastic outer sleeve. Specially designed triangle rim to prevent plate from tipping over and to provide grip. Reverse curve on the inside rim for easy scooping. Removable Non-toxic PP Outer Sleeve, PP outer sleeve layer is a safety feature that protects babies from high heat. The Stainless steel can be heated directly, when PP outer sleeve is removed. Food Grade Silicone Lid, keep food safe and fresh.