I use these for a variety of purposes (in air tight food containers for pasta, rice, bread, crackers etc as well as in my gun safe, document safes, etc) to keep humidity from ruining contents. They work well, and I like that they can be easily recharged when the color change indicates it is time. The fabric containing the desiccant silica gel is sturdy to prevent leakage of any silica beads. I like that these are food safe (I also use them for non-food items) and use only food safe desiccants so that I don’t need to keep track of which desiccant packs are safe for foods. These are fairly expensive but given they can be recharged and that they are food safe, they are a good value. 5 stars IMHO.