Following on from jason's post i would normally only use the tank on hard floors
How to make a simple tank post LOL
Use a 5 litre clear plastic container drill a small hole in the lid fit a small brass gas tap with a length of wind screen washer hose.
Cut half the bottom of the container out with a sharp stanley knife sand paper rough edges
Make up a bracket and strap to machine. All done for £6
Wait for it you can't do that it is not professional :

you got to spend a £100 on a tank that drips
