I designed this container from scratch to be a bit evil. 😈 This cache can be setup as a multi or traditional. In the top screw you can put a message in that says this is a decoy, the real geocache is close by, keep looking. While the small screw in the base really houses the log, slotted screw driver needed to take out. I would suggest you add, special tools needed. I added a slot close to the top for a ziptie and one spot of it has a small perpendicuar slot for the attaching ziptie so it doesn't get cut tightening up. I also added a profile for a gasket to keep it dry made out of TPU, use a drop or two of glue to keep it in place, on the screw top side, note: It will be a little offset due to the threads. I'd love to hear about your logs with this container, send me GC, THX. Cache On!