Uh, actually, in the real world, Bison Tubes make HORRIBLE geocaches. Anyone who thinks they do, doesn't understand the definition of the word "Cache".
Yeah.. So what is the definition of the word "cache"? Because, an online website (provided by a college) states that: A cache is a hidden storage space.
The bison tube is a hidden storage space for a log. So what exactly did you mean?
Some people consider "cache" means something a little more substantial then only big enough to hold a small sheet of paper, more along the lines of...
"A store of goods or valuables concealed in a hiding place"
Which suggests items in the plural i.e. the container can hold trinkets. But the game has evolved (perhaps some might devolved) to include something so small that it can only hold a tiny scroll of paper.
Well yeah, but a micro is a micro- just supposed to be a log.