Are you tired of all of the excess air bubbling out of the can nozzle while filling and/or pouring out—-hindering the liquid flow??? Drill a quarter inch hole in the top of the can opposite to the spout. Buy a valve stem for a regular tire—remove or drill out the interior part of the valve—-lightly grease the butt end of the valve stem. Attach an easy-to-pullout temporary wire to the valve stem and feed the wire thru the nozzle, into the drilled hole and pull the valve stem, cap end first, thru your hole. Pull the wire loose and gently twist the valve stem so the grove near the butt end slips into place against the edges of your hole to lock it into place. The uncapped valve releases trapped air so that the liquid flows freely.