This 12 oz Portable Camper Mug features a powdered design with a natural cork bottom base. It’s made with 18/8 double walled stainless steel with copper inner lining. It’s a perfect ultimate coffee cup for urban travel and camping, and compatible with most coffee machines. It keeps drinks hot for up to eight hours and cold for up to three. Measuring 12oz, this custom 12oz portable camper tumbler with cork base (double walled). Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. We offer logo printing and full packaging customization. Product Highlights: BPA-free, leak-proof, travel-friendly.