Piping Rock offers its Piping Rock Eucalyptus 100% Pure Essential Oil 0.5-oz. Bottle for $2.49 with free shipping. That's tied with our mention from two weeks ago and $2 under the lowest total price we could find for a 0.5-oz. bottle of any brand of eucalyptus oil elsewhere. It purports to soothe the respiratory system and ease joint and muscle discomfort.