This vintage insulated coffee mug is branded with Donut Basket, a coffee and donut shop known for its "World's Greatest Coffee" slogan. The mug features bright yellow and red plastic construction with a secure red lid that has a small drinking hole and sliding cover for spill prevention. It is a promotional item from the Donut Basket location east of Livingston Circle, New Jersey, as indicated by the printed address and phone number.

• Made of durable yellow and red plastic with an insulated design to keep beverages warm.
• Features a red plastic lid with a small drinking hole and sliding cover for spill prevention.
• Bold red lettering on the mug reads "Donut Basket World's Greatest Coffee Service with a Smile."
• Includes a sturdy red handle for easy carrying and drinking.
• Bottom has a blue sticker with handwritten inventory number "1270."
• Condition is good with minor surface wear consistent with vintage use.

This mug was designed as a promotional and functional item for coffee lovers visiting the Donut Basket. Today, it serves as a collectible piece of advertising memorabilia and vintage kitchenware, perfect for display or casual use by collectors and enthusiasts of retro diner culture.