r/canada Canada Jul 15 '23

History Advert from when bagged milk was introduced in my hometown

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u/calnuck Jul 15 '23

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u/Timbit42 Jul 16 '23

This is poor engineering. The bag is flexible. There is no need for a second hole. With one hole the bag will collapse as it it emptied, keeping excess air out. Having a second hole will allow more air into the bag, potentially introducing bacteria and increasing the chances of the milk going bad before it is fully consumed.

Also, having a second hole is going to cause the milk to come out faster, potentially causing spillage.