These desiccant packages work so well! There is a guide to help you understand how many to place in whatever size you are using, which I found extremely helpful! I use these when I am doing my dehydrating or food storage, and I have not had a problem with mold since! They are larger than the last ones I got which I like a lot and are easy to use. I throw them into the food I am trying to preserve, and close the lid! That easy! These are food grade so they are safe to use with your foods. I would most definitely recommend these!