Uses: To heat, microwave for 30-60 seconds or place on an oven-safe dish and warm. You can put a small cup of water (uncovered) in the microwave or oven while heating for a moist heat which can be beneficial for aches, cramps or muscle spasms. To freeze, put in ziplock bag before freezing. Do not get wet or the rice will become soft and the bag will be ruined.
Benefits: Rice packs can be used hot or cold. Generally, one uses cold on acute injuries or recent injuries (occurring < 48 hrs) as it aides circulation and helps with pain relief to sore muscles and joints. Heat is used for chronic or recurring injuries (occurring or lasting > 48 hrs).