They have a fancy jiggler that presteeps and I have noticed a difference in many of the juices since they started using this gadget. They should be good to go straight from the mailbox. That said, I still find some like the milkshakes that do good with a short cap off airing and a couple days, just a slight change tho but the Custard... good when ya get it better in 2 weeks and really better in a month if you can wait that long
Juices like the Dews and the 2 Venom ones, I don't notice any change at all in them from the time I get them until the bottle is empty.