Spray guns with a plastic bottle attached are useful for dispensing liquid chemicals for feeding plants and lawns.
This model, the Superspray, has two dials on the side to control the flow of the water and the concentration of the mixture dispensed from the bottle. This hose end device can also be used with detergent for cleaning cars and patios.
The manufacturers are offering a free hose end connector, while stocks last, to those that buy a Superspray from their website after transfering from Carry on Gardening.