NCAA Michigan Wolverines 16oz Crystal Freezer Flared Mug with Pink Base and Handle 16 ounce crystal freezer flared mug with pink base and handle Uses patented non-toxic refreezable crystal gel Place in freezer for 30 minutes to an hour Freezer gel keeps drinks cold without needing ice. No more diluted drinks! BPA free, lead free, safe to use State-Of-The-Art refreezable crystal technology Keeps drinks cold for hours without using ice and won't water down your drink Not for use with dishwashers or microwaves