Customizable Mug

Exercise of OpenSCAD. This is a customizable mug. You can make it of any size you want. You can add an unicode char to the front face also.
What is an unicode char? Basically anything, including emojis. You can check a full list [here](https://unicode-table.com/en/#control-character).
If the one you like doesn't appear, check that you are using a [compatible font](http://www.fileformat.info/info/unicode/font/index.htm).

Post any errors, suggestions, insults or threats in the comments.

Have fun!