Keyka Lou Patterns shares a free pattern on their blog for their super cute Dumpling Pouch. The zippered pouch has a rounded top but a squared off bottom. The pattern is available in two sizes; the larger one is 3.5″ tall, while the smaller is just 3″ tall. The tutorial includes instructions for sewing the zipper to a curved edge. Get the pattern and tutorial.
[photo from Keyka Lou Patterns]