... indicate humidity; 4.customized packaging; About Silica Gel Cans:1.cobalt-free silica gel;2.tinplate box pack,beauty and versatility ... Product Description: Using internationally recognized high-quality orange silica gel as raw material, the body covered with small ... the internal materials with the latest international silicone-orange silica gel, nontoxic and harmless, the adsorptioncapacity, can change ...