KEEPS HOT UP TO 3 HOURS, COLD UP TO 9 HOURS. Double wall, vacuum sealed, and copper plated insulated coffee mug with thick, professional grade 18/8 stainless steel.EASY TO CLEAN, DISHWASHER SAFE coffee travel mug. All Swig Life coffee mugs and accessories (lids and bases) are top-rack dishwasher safe.CUP HOLDER FRIENDLY tall coffee mug fits most standard car cup holders. The perfect travel coffee mug or tea mug to go (tea infuser attachment sold separately).SLIP-FREE, SCRATCH-FREE, NOISE-FREE SILICONE BASE keeps your travel coffee mug tumbler from tipping over or making too much noise when you set them down.OVER 40 COLORS AND PRINTS to choose from makes Swig Life Travel Mugs the best unique gift idea for women, men, mom, dad, teachers, birthday, Valentine's Day, Mother's Day, Father's Day, Christmas, and Holiday.