what i was thinking is getting a mettal/plastic water bottle.
on the bottom, bore a hole for the nos intake, feed a high comp. hose into the bottle and seal it( wether it be jb weld, or epoxy, w/e)
then bore a hole in the lid, and place a small thin-tubed valve into the hole and seal t wichever what way, then have a hose attatched to this valve and have it simply lead into the air intake.
what i was thinking is pressurize the bottle with NOS and once pressurized, turn off the nos tank valve and open up the small halve at the lid.