This March I took a short course on bead embroidered belt pockets worn with folk costumes on Estonian islands. These wonderful bags were tied around waist and used for keeping coins and other small items. Indeed, this kind of extra pocket comes very handy nowadays as well (although I haven't worn mine yet), perfect for a phone or a camera, for instance.
My green pocket is not what they used to look like, the front side was usually fully covered with very colourful beads in different patterns. Unfortunately, I could not find any photos of the beaded pockets on the internet. I used my own colours and other ancient motives instead, the ones that were traditionally embroidered with thread. Here's an example.