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>and you can tell how old a beer bottle is by how deep the rings are (where the machine rolls it around to scan it). That's what the person you replied to is t
by dfcowell 9y ago
>and you can tell how old a beer bottle is by how deep the rings are (where the machine rolls it around to scan it).
That's what the person you replied to is talking about. Here in Vietnam, like Germany, they refill used beer bottles. You can tell a new bottle from old based on the scuff marks the machinery leaves on the glass, which build up over time. These are the "rings" the GP is referring to.
- BoorishBears 9y agoI assumed the machines were like the ones here, that seem to go through an almost identical process, but crush the bottle as a final step. I’ve had an experience with a poorly recycled bottle in another country that turned me off the idea...