I drew a cylindrical shape with a height of 7cm and a diameter of 4cm

Then I smoothed the bottom edges by fillet

The work of the inner void by shell

Then I drew a rectangle touching the upper circumference of the cylinder (2mm*3mm)

Then I did sweep and chose the profile and path

I smoothed out the outer edge I added by fillet

This is the shape of the cylinder before adding the duplicate shape to it

I drew a center line to make sure the pattern was drawn correctly

I draw a first hexagon

I drew a second hexagon to form the repeating shape to make the pattern

And I made an extrusion to etch the two shapes on the body of the cylinder

I created a rectangular pattern

I repeat the shape longitudinally

Then I chose the circular pattern

Then I determined the number and the distance to repeat the shape circularly on the surface of the cylinder

This is its final form

Finally, I put the material on it, which is black plastic

I saved the file in (stl format) and inserted it into cura to adjust the time

Then I saved it as (gcode)