Best five ringgit I've spent.
Five ringgit at Gardens Mid Valley will buy you this - the luxury of pretending that a public restroom is exclusively yours:
And you can put a name to your soap:
I'm not sure whether it was part of a promotion, but in addition to my change for a ten ringgit note, I received a two ringgit voucher which could go to my second use of the posh restroom or the nearby cafe presumptuously named Pastis. Between one of the nicest non-hotel public restrooms I've ever seen and limp sandwiches, the choice is obvious.