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Interestingly, I have seen this in carbonated water. I had a stable bubble chain coming off just a single point of a freshly made SodaStream bottle. It was so unusual I videoed it on my phone. Not sure what caused the nucleation point or why there was a stable bubble chain coming off it, but there it was.

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Likely there was a small piece of debris stuck in that spot, which can sometimes happen in a dishwasher. You can buy nucleated glasses that do the same thing permanently with an etching in the bottom of the glass or little micro bumps.

A word of caution: Sodastream bottles aren't dishwasher-safe and can warp in the dishwasher.

This is not something you want happening to any pressure vessel. If it does, discard it.

Jesus. A distorted pressure vessel is outright deadly.

new bottles are dishwasher safe

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