this post was submitted on 18 Oct 2023
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Mandate the Mason/Bernardin form factors. Plenty of sizes, swappable lids, and afaik an open standard. /nod
That said, aluminum is super cheap to recycle and very light. I think that might be as good if not better. Crank up the deposit on the cans.
Yeah, though aluminum also has the advantage of being orders of magnitude lighter, so you save a lot on fuel for shipping at every stage of the process. Plus a glass bottle can only be used as a bottle: recycled aluminum is more flexible.
So it could easily tilt in favour of aluminum I think. BUt you're right that it's not clear-cut.
There used to be a glass plant near the town where I grew up.
The bottles don't just get washed and refilled. They're melted down and recast, just like aluminum. But the process is much less energy intensive.
Aluminum oxide (the natural form of aluminum as it reacts with the atmosphere) just so happens to have an extremely high melting point. Aluminum smelters must use all three of pressure, heat, and electrolysis to get the oxygen to burn off and liquefy the aluminum. Glass and even steel need only heat. I don't know what the final environmental impact is, but the energy input at the point of smelting is much higher for aluminum.