The various types of trays differ in terms of, on the one hand, tray geometry and material composition (EPS, PS, PET, PP, etc.) and, on the other, surface structure. For example, there are open-cell trays, which absorb liquids, or standard trays, in which liquid is absorbed by a separate absorbent inlay.
Naturally, most of the tray types are available in a variety of formats. Besides width and height, depth is also an important measurement. Shallow trays without edges are also called pre-cuts, or cheese or cold meat trays. Finally, for selling at the POS, these trays and pre-cuts are wrapped in stretch film or sealed with sealing film, by machine or by hand.