These are the available sizes of Dr. Singha's Mustard bath. It is a gentle herbal formulation of powdered mustard seed, eucalyptus, rosemary, wintergreen, and thyme. This blend of ingredients is so much more than the sum of its parts! Thousands of people claim that this wonderfully aromatic bath has brought them relaxation and well-being as well as relief from conditions as widely varied as stress, muscle and joint aches, common congestion, periodic tensions, sleeplessness, and fatigue.