I did manage to squeeze in a few "Mocktails" during that time...
Chinese plum and sprite float at Greyhound Cafe
Passion Fashion (a blend of passion fruit, pineapple and mint) at Greyhound Cafe
water:-) at Chatuchak weekend market, the aluminum cups were market sheik and helped keep the water extra cold.
Juice stand at Chatuchak weekend market. These fresh juices are tamarind, hibiscus, lime, longan, and coconut. They add sugar and salt to your taste.
Butterfly pea flower tea
Pandan leaf iced tea
My real disappointment was not being able to try the cocktails at food critic Jarrett Wrisley's restaurant Soul Food Mahanakorn. If you happen to be visiting Bangkok anytime soon, I highly recommend you stop in and sample some of his Thai inspired drinks using Kafir lime, coconut sugar syrup, lemon grass, Thai basil, passionfruit and lychee liqueur. I should mention, the food is delicious too!