Our Bento lunch boxes are leakproof for wet foods like dips, yogurts, and thick sauces. However, they're not leakproof for liquids such as salad dressings, soup, or sauces. To prevent any excess liquids from crossing over to other compartments of the lunch box when packing foods like watermelon or citrus, we recommend placing a folded-up paper towel at the bottom - or you can utilise our Bento Cups or Leakproof Dip & Sauce Boxes.