UA switched from the Trader Vic's Mai Tai mix to a "ready to drink" concoction about a year or so ago. With the mix, you are supposed to add the juice of one lime plus rum. Some FAs used OJ instead of, or in addition to, the lime. One time out of OGG, the FA told me that her secret was an additional splash of guava juice, which gave it a pinkish blush and also a nice flavor. But I don't think guava juice is loaded onto the beverage cart ex-Hawaii any longer. Now with the ready to drink stuff, the FA just pours in the rum, or hands the little bottle to you and you pour it in yourself. It's fantastic, but I still prefer the mix.
Both the mix and the ready to drink stuff can be found in supermarkets. I used to love the mix, but Vons/Safeway stopped selling it here in the L.A. area. I know you can still buy it at Bevmo, but I have since found the original recipe online, and now I mix my own the old fashioned way -- with a shaker and lots of ice.
