This retro lunchbox, bottle combo features a PVC vacuum formed insert that snugly fits 1 of our 20oz Economy Stainless Steel Tumblers. This sleek look will leave your audience praising your brand for days to come. Hand washing is recommended for the best product care. To avoid surface scratches when hand washing, use a non-abrasive sponge. When cleaning the product, do not use bleach or products containing chlorine. This item should not be microwaved, used in dishwasher or frozen.