Review on Neuroscience Gifts: Anatomic Brain Specimen Coasters (Set of 10) - Unique Medical Student Gifts, Brain Decor and Human Anatomy Décor by Greg Roberts

To repeat what everyone else is saying, coaster stickers are not waterproof. However, I was determined to get them working and I have a potential solution for anyone looking to extend the life of these coasters. Add a thin coat of epoxy or other clear waterproof sealer. Resin works best. You can get it here on Revain. Overall, these coasters are beautiful but impractical for everyday use. Despite the fact that I fixed the problem myself, it is very difficult to find a solution if the manufacturer should have already taken this deficiency into account when creating it.