Bulletproof vests need to be discarded after being shot.

A vest is bulletproof if you can shoot it and the human inside it keeps working. A laptop case is bulletproof if you can shoot it and... ?

If a human gets shot - even wearing a vest - they usually need a break, don't they?

...the human behind it keeps working.

Not without their laptop they won't be working.

You obviously need to replace it just like you would with a bulletproof vest ;)

I'd advise that human to invest in some body armor, for a variety of reasons. But it sounds like we're not talking about the same thing.

They are indeed a one-shot deal.