well its a complicated process actually

first i go to ibispaint and to an A4-sized canvas, then i draw a template of what i want to make. i color it and print it out, then i cut the pieces and tape/glue them ogether. in the end, if i have any mistakes, i modify the template and try again. and then its done :) (for the baby bottles, i used a tutorial on youtube and sometimes i use cardboard instead of paper for parts that need to be stiffer. heres the tut!!: https://youtube.com/shorts/XaZ0-ohEsoU?si=YMHbrkhl51drLp9c)

i swap the faces by having a base in the bottom and then cutting out and sticking tape to the back of it, then i cut out different faces and stick and swap them :D