To use, simply remove the cap and add hot water. The tool becomes a heated vessel that delivers soothing infrared heat to tired, aching body parts that crave extra care and attention. Following the principles of TCM, as explained in Sandra’s YouTube tutorial, we regularly use the benefits of heat energy to boost well-being. Notice Always test the temperature on your hand or arm first, especially before using it on your face or on others. If it’s too hot, wait for it to cool before use. If you have health conditions that may be affected by massage or heat, please check with a medical professional prior to use. We are not able to accept returns or exchanges on personal care products. Please carefully consider this prior to purchasing.