Orange Silica Gel Desiccant Dehumidifier 500g Features: - Orange beads will turn green after absorbing moisture - Made from Sodium Silicate, high porous substance that can absorbs up to 40% of its weight - Highest absorption capacity of silica gels - High quality, non-toxic and safe to be used to protect your kitchenware, shoes, drawers, collectibles and electronics - suitable for use with non-dusting packing of electronic equipment and in applications with visual moisture controls. - Each bottle have double cap to prevent it from absobing humdiity when not in use. Any product that will damage with high humidity such as leather, vitamins and electrical goods may have silica gel within the packaging. Drying processes like flower or seed preservation might also include silica get desiccants How to refresh the silica gel: 1) Take the Green Silica gel out of provided box and put inside any clean microwavable container (eg those takeaway food containers) 2) Put inside microwave for about 5 mins first (or 1-3 mins more if required) and once silica gel turned orange, it is refreshed. The silica gel will be hot when its refreshed, so leave it to cool down before putting in back to the your own usage method.