91色情片

Solid air fresheners and insecticides that work by evaporation quickly become
useless when left on shelves in shops for too long. Reckitt & Colman鈥檚
answer is an indicator which gives a direct read-out of the product鈥檚 condition
(GB 2347350). As usual, a block of water-based gel traps liquid perfume or
insecticide, which steadily vaporises. A hologram covers a window in the
packaging and remains in contact with the gel. When the gel dries out, the
hologram reveals a warning mark.