Symph!
That's a good idea. Women would love some summer light shirts with such drawings on them!
The idea with painting on bottles could also bring you money if you can sell them to various pubs/bars/clubs. Yet, to diversify your products, you could try to find bottles with all kind of shapes and sizes.
What about doing such artwork on other objects? I'm just thinking about other shapes, cubic, pyramidal, sphere, i don't know, maybe weird shapes.
I'd love an ashtray made by you
Since you're so talented, maybe you could sell some ideas to fabrics producers? Get inside the fashion world and stuff?
Am i going too far?
Let us know if you need a Jerry Maguire.