Looks good

One thing I noticed... if the circles on the top of the lid are the diameter of the base of an average soda pop bottle, then it should maybe be taller?

If it's one for cans of beer / coke etc. then its cool

Sorry, I'm actually, surely going off topic into the realms of product design here more than prop modelling as it's probably based on a real world object?

But anyway, a set of morphs to adjust the dimensions, e.g. height, would be well cool, perhaps? If you could figure that out...

I don't know if Bagginsbill has published a good plastic shader tutorial anywhere... or if we'll get some more plastic materials in a future release from him and Dreamland... but I do think a good set of shaders for different plastics are maybe missing at present??