Normally, what you put a guitar
in to carry it and protect
it. Comes in two forms, a soft case which bends but has some padding and offers some protection, and a hard case, which doesn't bend, and offers more protection. Some cases even have pockets or containers to hold guitar pick
s, music books, or spare strings.
Also, useful for hiding things when you want to carry something "questionable" around. Kinda like a violin case
, except for things bigger than a small machine gun
. My friend brought some katana
s to high school
one day. I'm sure the administration would have had a field day if they found that out.
Other things you can hide in a guitar case:
Lethal Frozen Fish
Large amounts of unmarked, unconsecutive bills
Your cat, or your dog
Many many more...