Mug DOES NOT LIGHT UP. This Monster Jam Grave Digger Grim Monster Truck Collectors Mug from 2001 is a must-have for any fan of the franchise. The mug features a colorful design of the iconic Grave Digger truck, along with skulls and other monster-themed graphics. Made of durable plastic, this large mug is perfect for enjoying your favorite hot beverage. It also includes a handle for easy sipping. Whether you're a collector or just a fan of Monster Jam, this mug is a great addition to your kitchen or office.