Just heard part of the CBC radio interview onnThe Current with Robert Osborne. The part I heard had him say “I’ve used lift bags and you just put a puff of air into it”. That sounds more Ike a DSMB than a lift bag. I’ll have to find the podcast later today and listen to all of it.
Puff is a relative term. Perhaps you're being a bit literal. Let's just say you don't need to drain two Al 50's to accomplish the job.