Product Review
The cap size is 38mm which will fit most growlers. They can also be used for other containers requiring a tight seal, which include many 1/2 gallon and 1 gallon milk jugs.
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The cap size is 38mm which will fit most growlers. They can also be used for other containers requiring a tight seal, which include many 1/2 gallon and 1 gallon milk jugs.
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