Using this VitaJuwel ViA Heat Vitality Crystal Infusion Insulated Bottle is easy. First, if you want to use the tea - brewing feature, put your favorite tea in the extra - large tea strainer (you'll need to buy it separately). Then, fill the bottle with either hot or cold water. As you drink, enjoy the energy from the Emerald and Clear Quartz inside. Remember, this bottle is made of glass, so handle it gently to avoid breakage. To clean it, use mild soap and warm water. Don't use abrasive cleaners as they might scratch the glass. Keep it in a cool, dry place when not in use, and it will serve you well for a long time.