This might be the ultimate camp mug. It has a double-wall vacuum insulation and it’s the perfect size to enjoy coffee, chili, or ice cream longer. The MagSlider Lid seals your mug to prevent splashes, and when removed, the bottom grooves allow mugs to nest perfectly so you can stack them and save space when storing. Like all Rambler Drinkware, the mug and lid are dishwasher safe. Please note: Do not place the mug over an external heat source or open flame, vacuum seal or damage may occur. The mug’s wide opening means contents may cool quicker without the lid. - A stackable, versatile mug that’s big enough to double as a camp bowl - STACKABLE BASE - Remove the lid and nest your Rambler 14 oz Mugs to save space - 18/8 STAINLESS STEEL - Made with kitchen grade stainless steel. Puncture and rust resistant - DOUBLE-WALL VACUUM INSULATION - Keeps cold drinks cold and hot drinks hot until the last sip - DISHWASHER SAFE - Because no one needs more work to do. The 14 oz Stackable Mug is 4.03 in high and 5.1 in wide. It is not cupholder compatable.