Yes, the vinyl stickers are totally waterproof, heatproof & anti-UV. However, it is not advisable to put the tiffin carrier into the dishwasher. It will definitely last longer with washing by hand and dried with cloth soon after washing.
We have several different variants. The Standard and Premium variants are not leakproof. However, our Deluxe tiffin carriers are both leakproof and have insulation to keep food fresh for even longer periods.