First to tell my experience, I sent masala powder to a buyer in the other part of the country via Speed Post. The buyer complained of tampering with all the plasters ripped apart and the plastic container open. I resent via Professional couriers and again I faced the same issue. I only get to hear - "It must be Customs Officials".
How do I package my powder so that it is customs friendly and at the same time it doesn't get tampered? Which courier is really dependable?