Modern Colored Heat-Resistant Glass Stackable Coffee Mug with Wood Bottom Colorful Double Walled Insulated Glasses - Set of 4 (Heat Resistant) We offer 4 colors - Brown, Clear, Ocean, Jade. If you choose "Assorted" at checkout, you will receive a set of 4 colors. 2 Styles: Wood Bottom: The wood part is connected to the glass as a part of the design and CANNOT be removed (no coaster needed). Style with the wood bottom does not stack. Without Wood Bottom: The style without wood bottom is stackable. Multi-use: suitable to be used as a water glass, coffee glass, or tea glass. Cleaning Instructions: - Handwash only - Do NOT microwave (Although most of our glasses are heat resistant, sudden change of temperature might damage the glass) Capacity: 300 ml or 10.1 fl oz Material: borosilicate glass