This Flashing LED Tumbler with Straw is made of clear plastic, perfect for water, soda, iced coffee and any other drink on the go. Each cup features vibrant blue LED lights built-into the lid that put on a dazzling light show with your choice of three different light functions and a color coordinating straw. To create a memorable brand giveaway, customize both sides of the snowflake shaped plastic insert with a brand name or logo.