Kurt set his nail file on his bedside table before crossing his arms over his chest, glaring at his roommate. "And as the person who picked out and paid for said gift, I can take it back when you constantly piss me off." Not that Puck ever deserved to get a gift from Kurt in the first place.
Or, really, Kurt didn't think he deserved to get gifts from anyone. He wasn't nice to anyone, not even Quinn. Not really, at least.
"I can also decide if I want to give it back to you at some point or if I want to throw it out the window and let it shatter on the sidewalk, therefor ruining the rest of it and making it utterly unusable."
In all honesty, Kurt probably wouldn't actually shatter it. It had cost a pretty penny (did that phrase count in England?) and it actually did smell really good. Especially on Puck.