How do they make things like a plastic coke bottle?

How do they make things like a plastic bottle? I have a product like that but I have no idea how you make something like that. And how would you make a prototype of an idea like a plastic bottle?

Thanks

Teed

How it's Made:

Here is a site that explains the process of making a PET (type of plastic) bottle and it has a great video as well.http://www.stevespanglerscience.com/experiment/the-science-of-making-soda-bottles

Prototyping:

A bit tougher but not impossible. You can simulate the final product with a SLA model. An SLA is a rapid protyping process that makes the part layer by layer out of resin.

You need to get a CAD model designed and then for about $150 you can get a plastic prototype made.

The SLA will not be clear but it can be painted. This video shows a bottle made by a 3-D printer.