Store unused bath bombs in a cool, dark place. We've shrink-wrapped each bath bomb to help preserve it, as well.

Bath bombs don't "go bad," but bath bombs scented with vanilla can start to turn brown due to the natural process of vanillin oxidation. This is a natural and harmless process that doesn't affect how the bath bomb works. We try to coordinate vanilla-heavy scents with appropriate colors that camouflage oxidation.

Bath bombs won't "go bad," but after about 6 months they could start to lose their scent and fizziness.