>>788836>>788882>>788978Pocket bellows is awesome: I bought one, cheap AF and perfect for its job.
However -- back in the day when I used to hang around Rainbow family/Hippies (yeah I know, fucking libtard tree-huggers -- but trust me: You haven't lived until you've lived with 9 nudist free-love italian girls age 13-20 under a tarp for a week..) we used pipes á la "peace-pipes" as bellows. I.e; turn the pipe 180 degrees and cover the bowl with your hand...
So, I've recently bought a 50cm carbon tube on ebay ($4, 18 gram), and currently waiting on a lightweight bowl to fasten on it somehow. Sure, not collapsible, but just as light, and multiuse.
Pic related, not Italian nudist girls, but a peace-pipe thingy: Though I'm not closing the end of the pipe, but use my index finger.