Can I put it in the Dishwasher? Dishwasher safe (top rack <40 degrees). Please remove the seal on the lid of the Bento Three+ when washing and clean with soapy water. Make sure both the lunch box and seal are completely dry before reinserting it. 12 month manufacturers warranty. Vanessa Martell-Mead Taking Care of Your Arctic Wolf is Super Easy! Is the Lunch Box Leakproof?