All other juices can be sold at price of around 50z-70z I guess

Items: Meat as many empty bottles as you can get fez gold as many fruits as you can get (APPLES, banana, grape, carrot)

Go to the PVP Room (south east inn) in Prontera and climb up to the second floor. Talk to the son. Show him the meat, and then ignore him. Talk to the mother. Now, you can create juices in the Payon PVP room. It is found at due east; at a building past the place three women are standing around talking.

Comments: I highly recommend you to do this quest for the apple juices, which can sell at high prices to pet owners you wish to feed their Porings. All other juices can be sold at price of around 50z-70z I guess. Really up to you.

If you don't want to make fruit juices, which may take a while to sell, you can make Red Pots instead with 1 Empty Bottle +1 Red Herb at the NPC at Alberta where you got your products for the Merchant quest =).