Come and see our amazing products. This mug is designed with a double-thermal layer of insulation, which means outstanding temperature retention in cold or hot. Food grade stainless steel for easy care and durability. D-Ring Carabiner Hook let you attach the mug to backpack or any gear easily. Perfect to be an essential climbing, hiking accessory for campers, backpackers, hikers and climbers. Customized is available. Pls confirm further with us if any query about packing info, inventory status and time schedule.