Very interesting idea, and a good start. But I feel like it could use a few improvements.
1. It should be partially transparent
2. Popped bubbles should have more plastic leftover. The way it is now, it looks like someone ripped the holes off instead of popping them. The holes are supposed to be popped, but not removed. I can see you put some detail, but they don't look quite right.
3. Add some variation to the full bubbles