Cache is a centrifuge container, that has an orange lid and only a logbook. Please bring your own writing instrument to sign the logbook, and replace as found.
Today, we retrieved an old res2100 container and I decided to keep it and put it back out in the wild! Of course, you'll have to do what res likes to most which is to solve a jigsaw puzzle.
(BTW, your cache could be next. Yeah, you!)