I'm waiting in the bank and they have a water dispenser. Someone sent in their daughter to get a couple of cups of water - they weren't using the bank, just came in for the water.
My first instinct was it was a bit cheeky, but actually is it? It wasn't the last drops during a drought, just a couple of cups of water.
I'm still waiting to be seen so thought I'd ask - cheeky or not?