A couple of questions about baggies.Every once in a while I find caches with half-sized or even smaller baggies. These seem to be particularly useful for micro caches. Where would someone get these baggies?Next question . . . It seems as though not all baggies are created equal. I've bought generic baggies and Ziplocks in the sandwich-bag size and I suspect they're OK for holding my signature items and dropped in goodies for the short-term, but I've seen folks who have thicker baggies (almost like a freezer baggie) that are sandwich sized. What are these/where can you get them?