[joshvm]

A store in the UK (sainsburys) briefly experimented with selling milk in bags. You bought a big jug which the top-up bag clipped into. Ostensibly it reduced plastic waste. Pretty sure it was cheaper than buying bottles. It never really caught on though and they canned it.

https://www.telegraph.co.uk/news/earth/greenerliving/7307719...

[selimthegrim]

Bagged milk is still big in Canada (at least a decade ago)

[lewisgmb]

Confirmed, milk is sold in 1l bags and has been all my life.

[Scoundreller]

They're 1.33l.

A company once tried the usual "Let's reduce the size of the package and nobody will notice" shenanigan and made 1L bags, but it was blatantly obvious when it didn't fit the plastic jug anymore.