This Matte Black Retro Lunchbox with a Stemless Wine Glass combo features a PVC single vacuum formed insert that snugly fits 1 of our 12oz Rubberized Finish Stemless Wine Glasses. 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.