Customized Thermoses & Vacuum, Camper 14 oz Double Wall, Vacuum Mug w/ Copper Lining - 8Hr Hot & 12Hr Cold, The Camper 14 oz 18/8 double walled stainless steel vacuum sealed mug with copper lining is every adventurer's dream. It will keep your hot drinks hot for 8 hours for those cold evenings under the stars and your cold drinks cold for 12 hours. This mug is convenient to use, has a handle and is compatible with most single serve coffee machines. It features a clear, push-in lid and is FDA compliant and BPA free. ... #KM4401 $17.95/each.