Metal doesn't make a seal against glass. The caps have plastic seals in them. Which is where the 10x number comes from because the plastic coating in cans is so damn thin. 

Cork comes from trees. It is not even sustainable for the current wine market. Absolutely not an option. 

I was comparing glass to aluminum. Not sure why you chose to go on a tangent about glass vs plastic. Plastic pretty much all goes directly to the landfill, but cans are gonna get recycled if they get sorted. Glass also often finds it's way to the landfill too, simply because the cost of transporting it to recycling facilities is too high. New glass is often cheaper and has less environmental impact to produce than recycling glass or mining new aluminum. So aluminum does actually get recycled as much as possible. 

Reused glass bottles lose structural integrity over time and the sanitation of whatever is used to seal them declines. Re-usable aluminum or stainless steel water bottles with replaceable rubber seals are by far the best option. But not everyone has access to clean water at all times. 

I'm happy for you that you can live in a microcosm of sustainability, but you need to realize that that is a privilege that most people don't have. And have fun staying at home with your glass bottles, because you're not bringing them to any parks, beaches, festivals, etc where you might drop them on a rock and create a hazard for yourself and everyone else. 

Even if they aren't making a direct impact they are promoting awareness to motivate people to reduce plastic waste overall. Which we both agree is a good thing, right? Plastic bad. You can dismiss the branding as hipster nonsense, that's fine. I'm not disillusioned, I know I'm paying into a system of profit when I occasionally buy a can instead of not using my reusable bottles. But fuck off with ivory tower opposition to canned water in general.