The term 'Supermarket Stack' refers to the process of stocking shelves in a supermarket. This job requires the ability to organize and arrange items on shelves, as well as the ability to lift and carry heavy items. The two solutions for this term are 'CANS' and 'TINS', which refer to the containers that many food items come in. CANS are typically made of metal, while tins are usually made of tin-plated steel. Both CANS and tins are used to store and transport food items, and they are often found on supermarket shelves.