I'll add a point about the pail, since LemonadeJoe brings it up.
My first effort at bubble I used a three gallon somewhat flexible plastic pail with the product, ice, and water together. I decided to use one of those paint stirring devices you attach to your hand drill to mix everything. It's basically 2 feet long, one end fits into your hand drill the other end flares into 4 nylon plastic "paddles." It looks kind of like a flower on it's stem.
I set up in the living room on our large central rug. I decided to not use any bubble bags at this point figuring I could pour my mixed contents into the bubble bag stack afterword. I didn't want to accidentally have my mixer attachment grab and tear up my new bags.
After a few minutes of mixing from my perspective things seemed to go well. In reality, the cold was making my plastic bucket hard and brittle. All of a sudden the mixer broke off a piece of the side of the pail near the bottom about the size of my fist, with water, ice, and product all gushing out onto my living room floor.
My wife didn't take this situation with the calmness and grace to which I had become accustomed.
Long story short, use the big hard plastic buckets from Lowes, Home Depot, or Canadian Tire I guess in Canada. And a good outer mixing bowl or something to contain things if the pail fails. Plus I 'm ditching my paint mixer attachment.