I recently got the tiny Bluespoon AX2 Bluetooth headset as seen on TV in the first series of Dr Who spin-off Torchwood (see my previous funny on that - Amazon were illustrating it with a pair of scissors!).
The Bluespoon AX and AX2 instruction manual/user guide includes the following gem on the last page:
· Do not try to eat/swallow headset or battery.
(Yes it is that small - just about. Sadly it's no longer silver, unlike in Torchwood. Full review to follow soon.)