Sorry, but that is a poor blanket statement to make. Whether a beer is in a brown glass bottle or can, the taste of the beer does not change*, any difference is a misconception. There is no metallic taste from a can, contrary to popular belief. *The only difference is that a can lets no light in and a brown bottle lets in a small amount of light, which can damage a beer's taste because it reacts with the different chemical compounds in the beer and alters the taste of them. In this way a can is a better packaging than glass. I will also add, that if you are making the distinction between beer from a can and beer on draft, all beer on draft is in a keg, which is essentially a very large stainless can. I just want defend against this common misconception and let you know that canned beer is not a bad thing. Now if you are saying this because the vast majority of canned beer is "triple hops brewed," pulled by clydesdales, and cold brewed; then that is a different argument all together.