Green Bags

While buying a cake for someone's birthday today, we got a free "green bag" (yes those for supermarketing that saves you 10 miserable cents for every $10 spent at NTUC).

Shopgirl: This is for you. We give it to members who buy one whole cake.

Me: What is it?

Shopgirl: Its a green bag.

Me: No, its yellow [The bag was yellow!]

Shopgirl: [pause] Huh, errr, no its a green bag. Its for...

Me: [rudely interrupting but smiling while doing it] Yes, I know what a green bag is. I'm just saying its yellow.

The shopgirl just gives me a strange smiley look and carries out packing my cake.