I don't think CBD would make you sleep shorter if you just added it to your prescriptions unless you had trouble falling asleep. With that it might help, but you would likely need a higher dose than people without prior exposure to psych meds to get any effects.

It should be possible to release oil from unsuitable plastic containers by drilling two small holes with a knife. I would expect $100 pay for a decent dispenser, but then the whole industry is still in its infancy.