My wife and I have been collecting and using essential oils for years. Decided to build her a caddie for her 5ml mixes to keep by the diffusers. You can print off as many cups and then just have to add the stacker. It allows you to remove the upper so you can easily grab the ones you want to add to your diffuser. You can print an extra cup as a lid to cover the top. My wife loves this setup and it works really smooth. No issues on the mini and I will for sure try it out on our P1S later and add those files.