There is a huge network of stores in Brazil where you can get Dotz. Dotz functions as a currency and it is currently one of the largest loyalty programmes in Latin America.
Baggage is carried in the hold for free on all flights except for tap|discount. If so, please be advised that you may purchase this service in the next step.
If you are traveling with checked luggage and have a connecting flight in Brazil, the United States or Canada, be sure to collect your luggage for customs control in these countries. Then follow the directions and go to the luggage transfer point.