The use and application of desiccant bags is prolific throughout industry for the protection of everything from electronic products to cloths.
A standard size range of 1 gram, 3 gram and 5 grams and 10 grams desiccant bags are selected notionally chosen on size. The difference in unit cost is insignificant. Any application where the product is unsealed (handbags,Printed Circuit Board, light-emitting diode, etc) the desiccant bag will be attempting to dry the environment.
Protecting precision instruments and products against the effects of humidity and condensation is relatively simple. By packaging properly (keeping your product in a sealed box or bag) with a suitable desiccant bag provides product reliable protection.