It's important that you allow the shampoo bar to dry out before storing, especially if the storage option has no drainage. Shampoo bars are water activated, so if left moist they can continue to dissolve.
We recommend our hålla soap dishes which are super absorbent with drainage, and made from 100% natural diatomite, our soap dishes help keep your shampoo bar free from excess moisture in between use -https://www.gruum.com/product/halla/?v=79cba1185463
When travelling we would recommend our låda tin -https://www.gruum.com/product/lada/?v=79cba1185463
