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For over 100-year Thermos has been the leading manufacturer of convenient, insulated products. The Raya line of lunch coolers is a perfect combination of fashion and function. Beneath the fun graphic prints and smart stripes is premium IsoTec insulation, which features a layer of closed-cell polyethylene foam positioned between an outer layer of textile and an additional moisture repellant, heat- sealed PEVA lining. Raya coolers and totes are perfect for packing a lunch for the office, or sodas for the beach. Interior and exterior can be wiped clean with a sponge and mild soap. Not for use in the microwave or dishwasher.