The cold pressed juices were 'leftovers'/soft changes that follow from the DoD trial last year. Apparently feedback is good and it'll be around here and there. I had it on a flight to Jo'burg I think and it was really good!

Same case applies for other things you see here and there now, like Sauternes.
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Also, I can imagine some potential cost savings (pax more likely to take juice AND smoothie in the past, whereas probably not juice and juice in this case?)