Desiccators used in biology do not differ from conventional ones in design and even in appearance, but they have a fundamental difference: the liquids in the desiccator vessels do not come into contact with the atmosphere.
The advantage of reusing the desiccation vessel repeatedly by using paper bags is to maintain the moisture level in the vessel constant, which dramatically increases the shelf life of the materials and prevents the possibility of losses due to changes in humidity. Such an assembly system allows operations to use vessels outdoors without the harmful effects of atmospheric precipitation on the evaporated materials.