Espresso / Coffee Knockbox

I was looking for a knockbox for my espresso machine and was dissatisfied with the price of these. It's literally a container with a bar on top.
To I decided to design one - how hard could it be.

Update: I added an accessory box to hold all the parts for a Breville machine. Might also fit other machines accessories but no guarantees :)

Update 2: Added a hole to store a goodcook thermometer for the milk temperature. Also added drain holes in all the pockets for the water to get out. I added small areas at the bottom of the accessory box to add little rubber feet if desired. Removed the thick knock-bar as it caused too much splash damage when knocking the coffee of the filter.

The container is printed in 0.33mm layer height and 20% infill with 3/4 walls.
The bar is the same but I used 10 top layers to strengthen the area I will be knocking on. Maybe it makes sense to coat this whole thing in plastidip to make it more water proof and easier to clean. We will see.

Support: I