Ah'm Pure American So Ah'm Ur

Last week at the end of Cindy's class we were all reclaiming our water bottles. They tend to move around the room as we take sips (gulps) then move to new spots. Mindy Meyers had collected all the bottles and was calling out, "Who's is the Evian?",
"Who's is Volvic?",
"Who's Fiji Water?",
"Who's Pure American?"

Hahahahahahahahahahahahaha!!!

That's mine, I'm Pure American!!!

Needless to say nobody else in the class could understand why this was so funny and even after trying to explain the Glaswegian use of the word 'pure' it still didn't really translate. It was pure dead brilliant though!