Rudolph the Red Nosed Reindeer Light Up Tumbler with straw. NWT. rudolph Light-Up Tumbler with Straw Brighten their snacktime when sipping from This plastic tumbler featuring a twist-top cap with a lighted and flashing bottom. Just press the button on the bottom to turn on and off. Includes built-in removable twisty reusable straw. Magic in the details Double-wall tumbler Depicts all the Rudolph Christmas characters. Twist top, spill-free dome cap unscrews from tumbler cap for cleaning and battery access Reusable straw with flared bottom Requires 3 x LR44 button cell batteries, included Wash thoroughly before first use Not microwave or dishwasher safe Hand wash only Twist off dome to remove before washing Do not immerse in water.