Okay - so I haven't been there yet (2 months to go!) but are you referring to the Lilikoi juice that I've read they have there? If so, they have it all over Hawaii too. My family finally tracked some down in California where we live. Here is the brand:
http://www.hawaiiansunproducts.com/juices.html
We were able to find it at a Long's drug store and a local grocery store. So good!
Is this included on the DDP - can you get it for dinner?