I've yet to encounter one of these while caching outside of North America, but in the US and Canada they run a close 1-2-3 in frequency, with guard rails and AMIATs only slightly more common.
My first ever cache was this type, and no fizzy grid would be complete without one.
This cache was placed for the 2013DLA event. Please do not seek before 9:00 a.m. on August 24th.