Costco sells 12-packs of these delicious treats:
I built a $3 cold smoker attachment for my MES. I can post construction detail, if you want. You've seen the basic idea before, but I think my build might be even simpler than some of the other tin can cold smoke attachments, and it includes a safety screen at the bottom which acts not only as a stand, but as a way to contain any hot ashes (potential fire hazard). It uses a single charcoal briquet as the heat source, and after experimenting with various ways to separate the charcoal from the chips, I simply used a piece of aluminum foil, crinkled up so it provided a barrier between the briquet and the beginning of the stack of chips.
I got about 90 minutes of smoke using one charge of regular Weber hickory chips. No fancy pellets or sawdust. I built this attachment rather than using an AMPS because I wanted to be able to use regular chips. This gives me access to more woods, and avoids any flavor issues one might get with wood that has been processed. I obviously will have to recharge it more often, but 90 minutes is a pretty good start for simple cold smokes.
And, my only cost was the $3.80 3" duct elbow (Home Depot). I had the 3" clamp and hunk of screen in my junk box, and the tin can was from left over from some chickpeas uses to make hummus (which I smoked when testing this).
So I smoked these Chinese dumpling, along with some cheese, carrots, cured (but not smoked) ham slices, and everything else I could think of. The other things were tasty, but the Char Siu Bao were out of this world delicious. After smoking, I microwaved each one for about 40 seconds, in three 15-second bursts. Absolutely fantastic !!
Highly recommended for all you cold-smokers out there.