A four-fold 'star' pouch (origami design)

Here's a design I came up with a few years back - it is published in this year's Origami Fold-A-Day Calendar, as the entry for December 1:

As you can see from the crease diagram (marked '3.' above), the shape results from a set of symmetrical crease patterns, which you draw on your sheet of paper and then fold along - the final shape almost creates itself :) Here is the crease diagram again, with each fold marked to be a 'v' (valley) or 'm' (mountain). Fold the '1's first, followed by '2's, finally, the '3's.