My fiance found a 3 pack of 32oz heavy duty clear plastic cups with nice lids at the Everythings a dollar store yesterday. They actually have several sizes for good deals. 16oz was a 5 pack. Exact same size/shape and lids are interchangeable with regular fruit fly cups. The 3 pack 32oz was of course just a dollar if you didnt figure that out from the "Everythings a dollar store" part. Same goes for the 5 pack of 16oz.
Instead of airline tubing, I use tubing from home improvement stores, found in the plumbing section. You get a big long roll of it for a couple bucks. Then I just cut it into sections for each of the tanks.
Pudding/Jell-O cups for tadpoles.... you can fit way more on the tad rack than you can deli cups, and I'm going to go ahead and assume that it's food grade plastic. Yogurt cups work as well, but the pudding containers are clear, usually a bit smaller, and they don't have ugly labels.
I use standard size aquarium air tubing for my "great stuff" straws. It works well, because its flexible enough to hit the hard to reach spots, and you don't need to try and maneuver the whole can around in the viv. You can use as long of a piece as you need. When I don't finish the can, it seems to only harden in the last inch or so, cut off the hard end, and good as new. Hope someone finds this useful.
When I first tried this, I was really excited about how well it worked. I had a lot of wood in the tank, and with about 2 feet of hose, I could apply the greatstuff anywhere I wanted. A couple days later the excitement was gone when I couldn't figure out how to apply silicone and cocofiber to the areas that were so easy to put the greatstuff in. Something to keep in mind when applying the gs.