Can you drink expired pop

Soda has a "best by" date - past the date it is likely to taste "flat" - as long as you know where and how the soda was stored, it should be safe.

However, there has been some proof that the Aspartame (fake sugar) in Diet pops start to dissolve the cans themselves, and that's why expired Diet Coke tastes metallic-like. So you're drinking dissolved metal, which can be really harmful to your body.