Two. If you only take one, he'll drink all your beer.
Shotgun method
A rednnnnnneeeeeeeccccccccckkkkkk.
It's because of all the crude oil they keep ingesting.
A brain sturgeon.
Because they'll get sand in their Schlitz.
None, the beer should be open by the time she has brought it to you.
They both ride bikes and go on missions.
You invite two of them.