How office twats 'stay hydrated'

Prompted by this fine Daily Mash article...

Where I work, a lot of people carry round those poncey re-fillable water bottles. Twattishness of the highest order, but it's still an improvement on people buying disposable bottles all the time.

Somebody in our office didn't get that memo though. Instead of filling his bottle at one the water coolers which our employer so generously provides, he took a fresh plastic bottle from the fridge, decanted the contents into his refillable bottle, crumpled up the plastic bottle and threw it in the bin.