How much duty free are you allowed? Going to Cozumel and Mahogany Bay.
I believe, 1 liter of liquor per person. 5 cartons of cigarettes.
‘Just remember, liquor must go into checked bags if you have a flight home.
Found this. I know it’s for the Bahamas, but I think it’s the same for Mexico
Ports & Port Adventures Excursions – Frequently Asked Questions
Are there limits to the amount of duty-free merchandise that I may bring into the U.S. from the Bahamas?
Each Guest returning from the Bahamas to the U.S. can bring back up to a total of U.S. $800 worth of duty-free merchandise (retail price). Each Guest 21 and older is limited to 1 liter of alcohol, and Guests 18 and older are limited to 200 cigarettes and 100 cigars.
Also, not sure about other states, but if you arrive to Texas, the state will tax all tobacco and booze, regardless of amount. The Customs would tax the same regardless of state.