Features: 1) Capacity: 2 / 3.5 / 9 / 11 / 15 / 20L 2) Material: 600D jean fabric and PVC coating. Upper and lower rings are PP plastic,which is environment friendly, innocuous and non-pollting. 3) Performance: bulk of an empty bucket may be contracted to 1/6 of the normal height, which provide great convenience for carrying and storing