They are so good they work great. You need to shake it and press the tip for a few minutes until the chalk starts flowing through the tip of the pen. Then you can go. I don't suggest storing them standing, I suggest you store them on your side otherwise you'll be too heavy for the front in the stream and don't want that. These are really awesome, they work great and allow you to write with chalk very easily and in a bold, colorful way.
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