Selling caustic soda and lehmon juice

There are many trade fairs and pasar malams that provide opportunities to peddle soft drinks. It can be a very profitable franchise to sell caustic soda and lehmon juice with minimal cost and high returns. Of course there are risks involved. Caustic soda is poisonous. What about lehmon juice? Don't have a clue what it is, but as long as it sells, why not?

All that is required is to take a few