I totally understood, and, actually, the past 2 hours I've been working on a pouch, and I JUST finished! I used beige yarn to crochet, and small blue yarn (i ran out of the little beige I had) to tie it all together and make loops to tighten it up top! It stretches a lot, so it ends up holding 3 original tamas (my genjintch mothra and angel). I actually really like it! Heres a picture with my babies inside, open and closed, and one without! Three total though:
First! Open up the pouch. So fluffy!
Second! Place your babies comfortably inside. Don't smush!
Third! Close it up and keep them warm!
Edit: Priestess I want to really thank you for giving me the idea and motivation to do this! And a ton of helpful tips! Thank you! (Took your idea on the folding. It comes out well!) I had no yarn needle to string it through, so I just used my hands.