Crystal Tea Energiser: The perfect vessel for your daily beverages. Made of high-quality borosilicate glass, this bottle is durable and resistant, allowing you to enjoy your favourite hot or cold drink on your daily travels. Leave standing for at least 6mins so the crystals can charge the liquid. The crystals are enclosed so they do not come in contact with the liquid.. . Rock quartz is known to cleanse and enhance the organs and helps towards deep soul cleansing.