The purpose of Bubblebags it to give you a few different grades of bubblehash. I recently purchased a set and was not impressed with the outcome so I went back to my old method.
Here's what I do:
1. Take a 5 gallon bucket, fill it about 1/3 or the way full of trimmings/popcorn buds. I add a 10lb bag of ice and about 2 gallons of water.
2. I mix everything for 20 minutes (non stop) with a drill and paint mixer.
3. I pour the mixture through a kitchen strainer to get almost all of the big leaves.
4. Then I pour it through one of those gold coffee filters (the permanent ones) to get that last few bits of leaf.
5. I let the mixture settle overnight. DO NOT SHAKE THE MIX AT ALL.
6. I use one of those $10.00 drill pumps to siphon off the top 2/3 of water.
7. I pour the remaining 1/3 in to 2 clear plastic pitchers (so you can see the outcome) and again let them settle overnight.
8. The following day you should see all the trichs at the bottom of the plastic pitchers. It looks almost like sand.
9. I again siphon off almost all of the solution using the drill pump. When I get within 1" of the trichs (again, DO NOT disturb what has settled) I use a plastic turkey baster to get as much liquid off as I can.
10. I pour the remaining "trich soup" (just a few oz of liquid)in my $50.00 Walmart food dehydrator. Those things come with a plastic pan (in addition to the drying screens) so you can make fruit roll-ups by spreading grape jelly on the pan and drying it out. Little did they know it works GREAT for hash too.
11. As the mixture begins to evaporate I use a razor and scrape the mush in to a pile. Eventually I end up with a nice chunk of hash.
Warning: Pay attention to the dehydration process. If you don't scrape it in to a pile as it dries it'll get stuck to the whole plastic pan and you'll play hell scraping it up.
Oh, that dehydrator comes in handy at harvest time if you want a little something to smoke while your buds are drying/curing too.
Lastly...this procedure doesn't give you different "grades" like the bubble bags do but the hash still kicks ass.
Good Luck!