How to best use NO2. Dispenser or balloon.

So, I love nitrous. I get it at the dentist a few times a year. I’m now sober from alcohol after 30 years, but I still like to get high now and again (keeping it VERY tame).

Anyway, I bought some bulk NO2 carts and have just been using them in a whipped cream dispenser. Wondering if I should put it into balloons? If so, do I inhale it back into the balloon to “recycle” it?

Sorry if this is a dumb question…