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 phases, 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. Foogo phases stainless steel products feature Thermos vacuum insulation which has been shown to inhibit the growth of bacteria in a laboratory test performed by Cornell University, and will keep beverages cold and fresh for ten hours. In addition to providing added protection from spoilage and food borne illnesses, Thermos brand offers parents extra peace of mind in knowing that foogo products use BPA-free materials. Foogo phases drink ware features interchangeable parts that fit all other Phases cups. With interchangeable lids and handles, foogo phases drink ware easily adapts to a child's changing needs. To clean, hand washing is recommended for best results, or top rack dishwasher safe.