you probably did the same mistake i did
you left the two juice boxes in the truck and thought it was ok and went talked to Sinamoi
but its not ok
you have to get the juice packs out of the truck and put them in the grey area in the garage
then go talk to sinamoi
yeah this pissed me off too at first
source: Seek'N'Loot - Dead Island Walkthrough Part 6: Act 1 - Resort - Ch. 2
