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I've just looked at the home pages of the two sites and they are pretty much the same apart from substituting plastics with bottles. I'm not an expert but I would have thought Google might think this is duplicate content.

In my opinion I would concentrate on one of the sites say plastics and have the bottle specific stuff as a subsection. I'm not sure how the sites rank etc so that may be easier said than done.

As for the site map / robot question, if you continue with two sites then I would recommend generating a new one for the copied site.

I'm a bit confused. You reference ensoplastics.com up the top and then show the robots text from ensobottles.com

Are they using the same robots content? The sites use different url naming so ensobottles uses rewrite whereas the other site uses ?p=

I've just looked at the home pages of the two sites and they are pretty much the same apart from substituting plastics with bottles. I'm not an expert but I would have thought Google might think this is duplicate content.

In my opinion I would concentrate on one of the sites say plastics and have the bottle specific stuff as a subsection. I'm not sure how the sites rank etc so that may be easier said than done.

As for the site map / robot question, if you continue with two sites then I would recommend generating a new one for the copied site.