Hi Maria! I should have shown more detailed images; unfortunately there is a piece of plastic in the pen. However this piece is simply the holding tank for the ink. The pen does not come with a disposable ink capsule, but rather a mechanism that allows you to draw ink up into the tank. I bought my ink in a glass bottle to avoid buying the disposable ink capsule.

If you want maybe I will post a tutorial of how to use it! Just let me know 😊