You're allowed to bring in as much as the Custom's Agent says. That varies from day to day, agent to agent, and quality of booze. Technically it's one liter per person. http://www.customs.gov.bz/exemptions.html
Make sure you buy it right at the luggage pick up. Put it in your luggage then go though customs and show them the ticket. Then you can put it in your luggage and fly to SP or where ever you are going with in BZ
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