I was packing my dishes the other day when I remembered how much I prefer to drink my water out of a glass. Thus I was prompted to write a post about how much I really do prefer glass to plastic. For me, plastic retains the flavor of anything that is not water. So if you have soda, kool-aid, or milk, even if you wash it with soap, it retains the flavor. Blech. In contrast, glasses don't retain the flavor of past beverages. And when you drink water out of a glass it just tastes better. I'm not really sure what it is about glass that makes a beverage taste better but it really does.
When it comes down to plastic or glass, I'll choose glass.