In order to have enough space for grabbing the tea bag if the dispenser is situated on a shelf I extracted the lower surface so the socket is now 25mm high. Its compatible with the add-on-base (same height) remixed by manual6464 (https://makerworld.com/en/models/898416-base-for-stackable-tea-bag-dispenser#profileId-856886).
I printed it in PETG with 15% Gyroid infill, 2 perimeters. First I just supported the front and the side gaps (3 support towers in total). I turned out its not necessary to support the two overhangs on the top as they print unsupported really well too.
Update 250407:
The author remixed this model.