I've got a 3/4 inch P. murinus, and its quite difficult to deal with! I have it in a small plastic container, slightly larger than a deli cup, with vermiculite as a substrate. The problem is that the only way to get a cricket in, or put a drop of water on the side is to pop off the whole lid, at which time the little guy bolts immediately for freedom. Any advice or suggestions would be greatly appreciated! Thanks!