Recyclability in product

Hello!

I recently transitioned from medical plastics industry into outdoor industry - yahoo!

I'm exploring marketing a premium insulated water bottle as "100% recyclable"
Sort of goofy question but I'm trying to understand what restrictions are in place to be able to use 1) the #5 PP recycling symbol on the product or 2) say the water bottle is "100% recyclable"

And if I blend a PP with a modifier can I still use the #5 PP recycling symbol? And say it's 100% recyclable
how about a PP + elastomer type blend?

And then to what extent of adding additives and modifiers is it no longer considered #5 PP recycling symbol and considered 100% recyclable?
Most PPs out there have some sort of modifiers and additives in them and still claim the #5 PP recycling symbol

Any idea where I'd get more info on this?

Just did some internet searches and there is tons and tons of info on how to recycle and what's recyclable from a user perspective, but not much at all for the manufacturer.
Any thoughts or considerations?