Colorful Double Walled Insulated Glasses 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 This product is made to order and usually takes about 2-3 weeks to ship.