(Was 20 written at the time when these Rezesion) buying I definitely have no regrets, apart from the high price this is a well-functioning spare parts for the old milk container!
Also the foam is better than the original supplied part (gray plastic) as also mentioned several times, the foam produced is somehow "more stable".
Now I just hope that the closure which presses the upper part firmly on think tank, last longer than the first milk container.