Glass bottles VS plastic bottles

I had a discussion at where I work about why it seems drinks from glass bottles taste better than from plastic bottles. I do think drinks like Coca Cola taste better from glass bottles, and some agreed with this and thought bottled sparkling water was better from a glass bottle. At first I thought is was psychological and that glass bottled drink just felt like better quality. But it appears that the actual drink itself is different between the 2. With sparkling drinks they in plastic bottles they carbonate the drink more because the gas slowly leaks through the plastic, so this could effect the taste of the drink. Even though plastic bottle drinks are cheaper, I prefer the taste of glass bottled drinks and I think they are also better for the environment.