Pen holder (with magnet slots)

A simple double pen holder that I designed to go on our fridge

First “functional” design so definitely still lots to lear - all feedback would be greatly appreciated!

I added slots to glue two disc magnets that we bought a while ago

Amazon link below to the exact ones (18mm diameter):

https://www.amazon.co.uk/dp/B09XK7FW23?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_3&th=1