It's a hexipuff with a super secret compartment for hiding notes or tiny trinkets! If you sew it into your quilt with the button facing the "wrong side", no one will suspect your quilt is hiding anything at all. ;)
Knit a puff like normal. Before you bind off, stuff it with about half of what you usually stuff it with. Instead of binding off, purl a round, then continue to knit each round until it's about the height of your puff. Bind off the same way you would a puff.
It'll look something like this:
Tuck your pocket into the puff. If you want to secure the pocket, sew the corner of the pocket to the lower corner of the puff with the end of the yarn before weaving it in.
Sew a button on one side. To make the loop for the button, you can use a crochet hook to chain 3 in the middle of the other side, and tie it off near the starting point to make a little loop.
Enjoy your secret puffs! ♥