I printed it in TPU, but you can use any material
Watch the video: https://youtu.be/9ZlQ9zwXDIo

Visit my youtube channel: https://www.youtube.com/channel/UCAyR0BtXEoFjiLdIOsNE1tw/featured?sub_confirmation=1

Print it normally without supports.
Do not put it upside down has shown in the video (that was a mistake).