Sip your tea in style with this glass mug with a double-walled design to provide insulation and to ensure beverages stay hot or cold. The mug features an elegant luna moth design and comes with a clear quartz crystal tea infuser to allow loose leaf tea to steep naturally while infusing your water with the soothing energy of the clear quartz. Please pre-warm mug with warm water before adding hot water. Avoid sudden changes in temperature.