I have always been a huge fan of menthol and bath bombs. I have tried Levels Natural Shower Bomb before but in a different scent. I thought menthol and cucumber would be an interesting and relaxing scent. The aroma was relaxing but the menthol was a bit more overpowering and the cucumber was barely scented. With most natural products, you should definitely use within a couple of days to opening otherwise the scent wears away really quickly.
