Most solid products are not suitable for bulk shipment and are packaged in bags or polyethylene-lined 55 gal drums. A wide variety of bag and drum filling devices exists, and details of specific designs can be obtained from manufacturers’ web sites. Small sacks are usually designed to be easily lifted by one or two workers and do not hold more than 80 lb (36 kg). Larger sewn bags and flexible containers can hold as much as a metric ton. The filled bags or drums are stacked on standard 1.065 m by 1.22 m pallets, and are usually wrapped with stretch-wrap or shrink-wrap or taped to prevent the contents from slipping off the pallet during transportation.