That sounds the opposite of "guaranteed"

I think what's actually guaranteed is that effect will be outweighed by driving some number of sales from plastic bottles to glass

If you were telling yourself using plastic bottles was magically OK before at least the design smartly avoided 2 molecules of plastic ingestion, you were wrong and the reality is any 2 beverage bottle designs made of plastic must both be completely dangerous bullshit

Can't fucking believe this is what you people pick as a topic for a thread at times like these 

 Just buy a darn metal bottle and abandon plastics altogether.