ack of 6 sillica drying capsules. For use with the Drying beaker (sold separately). Note - not for use as replacement capsules for the Dry Cap tub set (different size!) These capsules should not be opened until ready for use. Once they are taken out of their sealed packaging, they are activated and will only have a short life. After use, the capsules should be kept in the sealed drying beaker to prolong their durability. The capsule can be reused until the golden-yellow indicator has changed to a white colour It is recommended that you dry out your hearing instrument daily.