Travel Mug
How do you unscrew the bottom of a starbucks travel mug to put pictures in it?
I have have travel mug from starbucks, it's black and it has silver lines around the bottom of it. Can i unscrew the bottom of it to put pictures behind the plastic? because i saw this travel mug at starbucks that said you could unscrew the bottom and put pics in it. Mine is the exact same Design, but it doesn't say anything about unscrewing the bottom, please help me.... thanks so much 
Oh dear, just call the store and ask............