Shortly before the kittens moved away, they provided some much appreciated entertainment for everyone at BCM. With two kittens in, and one outside, the bottle was rolling back and forth and around the floor.
Kittens jumped in
Kittens jumped out
At one time, part of the third kitten was in the bottle but we felt maybe a picture of the end that didn't fit wasn't really appropriate.
It was all fun and games until the bottle rolled in the corner, where it was trapped and abandoned.