I got "educated" at our last Smocking Guild meeting. We somehow started talking about blue marking pens during our meeting and then someone mentioned how they are supposed to be stored. I usually store mine in a small canning jar or a cute little mug.....both ways they are standing vertically on one end or the other. The ladies there told me they are supposed to be stored in a horizontal position so that the ink will stay better longer. I had no idea! And now I have no idea of where I will store them because tossing them in a jar or mug is so much easier for me. So I ask....How do you all store your blue marking pens? Flat/Horizontal? Vertical? Or otherwise?