Depress the nozzle of the 16-ounce shaving gel can into the bathroom sink until it is empty.
Place newspaper down on a table. Hold the 16-ounce shaving gel can upside down. Clamp a can opener onto the rim of the bottom of the 16-ounce shaving gel can.
Turn the can opener to remove the bottom of the shaving gel can. Place the cut bottom of the shaving gel can onto the newspaper.
Remove the nozzle from inside of the shaving gel can and discard it. Place the can down on the newspaper.
Crumple up some newspaper. Stuff the empty can a third of the way in with crumpled up newspaper. Place the small caliber gun inside of the can. Cover the gun with more crumpled up newspaper.
Apply hot glue around the rim of the cut bottom of the can.
Place the bottom of the can onto the cut bottom on the newspaper. Let the hot glue set for 5 minutes. You can now place your hidden gun safe in the bathroom or wherever you like without the gun being detected.