This set of 4 mini water pressure sprayers can be used with most types of plastic drink bottles fill the bottles with water plant food insecticide or cleaning product then simply screw on to the bottle top pump up the pressure with the handle at the end and then squeeze the trigger once pressurised the nozzle can be adjusted to give a fine mist or a single jet depending on use it works with 550ml 1l 15l 2l and 3l bottles with the smaller bottles you will need to cut the pick up t