13D ...
Hold on there, not so hasty ...
Those of a sensitive disposition should look away [I'm still sensitive after being unceremoniously censored here for suggesting that I might occasionally get a bit "pi**ed" - that's "pie-eyed" for any shrinking violets looking in].
Anyway, for 13D you need a slightly more lascivious view of what "cup holders" are.
"Some" is PART backwards all right but money is BRASS - so put one in the other ("Oh Missus") and you get BRA-STRAPS.