The Downtown Void, the area with no caches at all, has allways bothered me. I mean, I understand the reason. It's very busy, there are tons of muggles, caches disappear all the time from here. Well, I'm on a ission to create a container that will withstand the Downtown Void and won't get muggled easily. Will I succeed? Only time will tell.
You're looking for a custom-designed 3d-printed container with a log only. Please exercise stealth, as I'm sure you'd do anyway.