Easy to use:
Just tear off the back sticker and stick it on the bottom of the cup, it can effectively increase friction and prevent slippage. Not microwave, oven, or dishwasher safe
Can be used on: 12oz/15oz/17oz/20oz/30oz wine tumblers, skinny tumblers, mason jars, straight water bottle, enamel, ceramic or camp mugs, etc.
Size: 2.2 inches in diameter, 0.08 inch in thickness