Why did the USSR produce triangular glass bottles?


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Why did the USSR produce triangular glass bottles?
Source
Why did the USSR produce triangular glass bottles? - the USSR, Chemistry, Vinegar, Package, Longpost
Why did the USSR produce triangular glass bottles? - the USSR, Chemistry, Vinegar, Package, Longpost
Why did the USSR produce triangular glass bottles? - the USSR, Chemistry, Vinegar, Package, Longpost

the USSR Vinegar Package Chemistry
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