From top to bottom the Rambler 10oz mug is designed to keep your coffee or tea hot right till the last drop, with it's double insulated wall and built in grooves for the lid to secure to and magslider closure will be sure to keep your beverage warm or cool. These mugs are also stackable once the lids removed to help save some space on the shelf.
The mug & magslider lid are both dishwasher safe, they aren't designed to be put over an open flame or heat source.