teotwaki
Excelsior!
The ghetto version of 4x4mike's
No tap needed
Purchase a brass hose bib with 1/2 npt threads
Just screw it into the opening on the cap (it will cut the threads)
Unscrew and wrap with thread tape and reinstall
LCI 5 gal jug $20
HD hose bib $5
You can lay it flat or on end
No shower but a cheap effective water source with little to go bad
How Sa-weet!!