I don’t know what you want. I have powder paint from many sources. It is 5-10 years old, so is my Walmart aquarium pump. I have all kinds of filters and I use to pay attention to them. My stuff is in the garage with no humidity control.
All of the cups have lids. When I get ready to paint I plug in the pump, turn the powder cup upside down and back, pull off the lid, put it in the holder, take an ice cream stick and stir it. Then it is ready to use.