All drinks are better in glass than in plastic. My water bottle that I bring with me to exercise is glass. I don’t always put water in it, sometimes its tea or lemonade.
There is a scene on West Wing where one of the characters talks about his alcohol addiction. He says he loved the glass in his hand, the way the ice made some noise when he moved the glass, how it looked, the whole ritual. The glass Coke bottle feels different, looks different, it’s all different, and for many of us it is reliving the past. It is what a real Coke is.
The glass bottled Coke in America often is the cane sugar Coke, which some people believe tastes better, so they might be saying the glass is better tasting, meaning the cane sugar, or they might mean all Coke taste better in bottles. No way to know what they really mean unless you ask the individual. The glass bottle feels different, doesn’t affect the taste of the Coke, and the bottle stays cold, while plastic has no noticeable temperature. I’ll tell you that especially towards the end of the Coke as it starts to warm, is when you can really tell the difference between cane a corn syrup Coke.