I don't think there is. In previous games, caps were part of our inventory. Now they seem to vanish aside from what the Pipboy tells us.
Ya... that svcks a little... cause once the large modding wave hits, we gonna have weighted caps and banks and stuff.
Weightless caps and ammo aren't my thing really.
Oh, i've met him.... xD
https://www.youtube.com/watch?v=c4DzB2YOjkE