B65D 81/267

Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, {or removing by ventilation,} fluids, e.g. exuded by contents ; Applications of corrosion inhibitors or desiccators {for absorbing gases, e.g. oxygen absorbers or desiccants the absorber being in sheet form}