Muscle Relief Bath Salts with Peppermint and Eucalyptus essential oils. Peppermint essential oil is great for relieving muscle aches and tension headaches while Eucalyptus essential oil clears blocked sinuses and helps ease the symptoms associated with colds. Choose between either a full size 320g Jar or a smaller 20g Vial. Our glass vials are the perfect amount of salts for a single bath. ideal for gifts, travel or to sample one of our varieties.