Long considered a trusted partner by parents in providing healthy food and drink options for kids, Thermos brand has brought its superior insulation technology to FOOGO, a line of children's products for ages six months and older. Freshness and safety go hand in hand. If not kept at the right temperature, food and beverages can spoil, causing potentially dangerous bacteria to form. The Stack N' Lock is foam insulated to keep foods fresh. All components interlock for easy and secure storage. The Stack N' Lock has a 12 ounce capacity and is microwave safe. Hand wash to clean.