A rainbow pallet is a pallet containing cases of different products versus a full pallet of the same product. It is also called a mixed pallet.
A pallet (also called a skid) is a flat transport structure, which supports goods in a stable fashion while being lifted by a forklift or a pallet jack. A pallet is the structural foundation of a unit load, which allows handling and storage efficiencies. Goods in shipping containers are often placed on a pallet secured with strapping or shrink wrap and shipped.