To be perfectly honest, I very rarely, if ever, use the mugs I buy at SDC. I'll use it when I buy it 'cause it comes with a drink, but after that, it gets washed at home and put into the box (for now) with all my other collected SDC mugs. I have a yellow Grand Exposition mug that I usually re-use because I was collecting just Christmas mugs back then, so I use that one but have very rarely gotten it refilled with anything but water, mostly because soda dehydrates, and I am always needing lots of water when I go to places like SDC or I'll faint.