What I do in Langkawi Island every time I am there. Have dinner at Rootian Restaurant in the middle of Kuah town. It is your typical five-foot way Chinese / Thai seafood restaurant. Food is excellent as always but no desserts or fruits available or served there after dinner. No problem. Just walk across the street to this one-stop supermarket. Buy duty-free Belgian Sea Shells Chocolates at RM 3.90 (about RM 14 in KL)