Anyone know if there are some customizable sippy cups available anywhere? Something you could insert your own design into, sort of like these.
Amazon.com: Playtex Insulator Cup 9 oz - 2 Pack,Colors and Design Vary: Baby
I've looked a bit now and have yet to find anything but looking at the above examples I'm wondering if I could possibly open them up somehow and do my own thing to them. Anybody have any experience with this?