Shopping for Breakfast Cereal in Thailand

We would like someone to be in a Thai supermarket and ask people if they would be happy to complete a survey where they buy a breakfast cereal (KokoKrunch or Milo) and tell us about the overall shopping experience. We would like the person asking customers to take part, to buy the breakfast cereal for them so that the customer doesn't have to claim back later. The customer needs to complete a survey in the Bulbshare app and we will provide instructions on how to do this.