How do you make a home made cozy cup? How about a cuddle sack?

Check under the "Hot Tips" section of the forum. You can get to it by scrolling down on the forum home page. There is an informative thread that lists the steps. If you can't find it you can use the search tool at the top.

Cozy Cup:
https://www.guineapigcages.com/forum/accessories/17507-how-make-cuddle-cup-requires-sewing.html

There is a great instructional video here:
(REQUEST)part 4 how to make cozy sacks and cuddle cups for guinea pigs, rabbits, etc. - YouTube

For the sack just watch the video it is much simpler:
(REQUEST)part 2 how to make cozy sacks/cuddle cups for guinea pigs chinchillas,etc. - YouTube

Hijacking this thread, sorry.

What is the difference between a Cuddle Cup and a Cozy Sack?