Here is a goal: To make a soothing foot soak

Which way makes more sense to accomplish this goal?
To make a soothing foot soak mix together 1/2 cup epsom salts and 1/2 cup bicarbonate of soda in a bowl. Once mixed well, add 7-10 drops of peppermint essential oil and 7-10 drops of lavender oil with a dropper. Mix everything together with a spoon, and store in an air-tight jar. To use, pour into a hot bath and relax.