Stores sell sturdy plastic jugs that the milk bags fit into snugly, so it basically pours like a pitcher. You just snip a small corner off the top of the bag once it’s inserted into The jug. The jug lasts forever, though it does get funky over time with any dribbles of milk that make it between the bag and jug.
I like ColecoVision best, but it had an unfair advantage, coming out a full 5 years after the 2600 and 3 years after the Inty. It’s really generation 2.5, competing with the 5200. But man, those arcade ports were so impressive, and the expansion module to play 2600 games made it the best of both worlds.