Decker 40oz Mammoth Tumbler Outerwear Our vacuum-insulated tumbler features a

Our vacuum-insulated tumbler features a double-walled

3-button placket with dyed-to-match buttons

while keeping your skin comfortably dry

Light end features a magnet to pick up materials

Double-wall vacuum insulated copper-lined

Decker 40oz Mammoth Tumbler Outerwear Our vacuum-insulated tumbler features aThe Mammoth 40 Oz Vacuum Insulated Mug is the ideal solution for storing and transporting hot or cold beverages. Our vacuum insulated tumbler features a double walled, insulated design that ensures your beverage temperature will remain consistent, no matter where your day takes you! Enjoy up to 10 hours of hot liquids or up to 22 hours with cold liquids.