This is the only brand of these silica I buy on Amazon now, Dry&Dry. I've ordered many different types from the orange to green (the latest) to the bright blue to just the white packs. I personally use these for ammo storage in sealed 50 or "Fat 50" Cal ammo cans, so I don't have to worry about food storage versions (do not use blue or orange for food, just the white ones). They work very well and it's always easy to see if they are used (absorbed max moisture). You will quickly realize that some ammo cans have better seals than others and it has more to do with where the metal can rim contacts the black rubber gasket, than what type of can it is. I prefer the 100% blue or orange packets for my purposes. Those both work the same so I just buy whichever is cheapest. They always come new, well sealed and ready for use. The colored ones are easy to recharge in the microwave, but most of the time I just buy new ones every couple years and throw the old ones away. I highly recommend these for long term, small sealed container storage.