Well, when I looked at it, I thought it was shaped all to ideally to be intended for just hoses... maybe they made it there so a cup could also fit in there when the hoses weren't connected? Who knows the true intention, but one of those travel mugs would fit in it, and it wouldn't be used while the backhoe was mounted, for hoses. Something with a little wider opening and a bottom to it would work a little better, too.