Folding trays with fixed lid
Folding trays owe their name to the fact that you can close them by fold the lid on the tray. The lid is attached to the tray. An advantage is that instead of a box of trays and a box of lids, you only have one box with the package in it. These trays are available in different sizes and shapes. There are round and oval bowls that are often used to package (meal) salads. The rectangular and square folding trays are often used for sauces, nuts, cheeses etc. If you want to package liquid products, opt for the "leakproof" trays.