I've never used the big or little drippers. I can't see paying money for something that I could make just as easily for less. Also, everyone complains about how hard they are to adjust. I just don't think that the fine adjustment that the big or little drippers offer is that important.
I just poke a pinhole in the bottom of a 32oz cup. I fill it up a couple of times a day as well as misting. I position the cup so that the drips will fall onto several vines or leaves one after the other - that way he sees lots of moving drops. It must work - he drinks!
My cage has a screen bottom and a cement tub built into the stand below for catching water.
This is just he way that I do it.
Joel Fish