That was definitely a life saver for the bars. Culturally it is very different here. We were the last state to raise the drinking age. No politician will win if they say they will tighten up the “drive thru daiquiri” loophole. Cops know virtually every person who gets a daiquiri is putting the straw in and sipping as they pull out of the lot. And this is not just New Orleans. It is nearly every county (we call them “parishes”) in the lower part of the state. MADD tried to shut them down in the 90’s and a satirical group called DAMM cranked up (drinks against mad mothers) it is just one of those nutso things down here. Maybe the hurricanes made us crazy. When I walk the dogs in the evening, it is common to do so with a “walking cocktail”. Sipping a Sazerac while taking the evening stroll is nearly expected.

Here is south Louisiana we have the “drive thru daiquiri” shop. Literally roll up, order a car full of daiquiris, and go. Since they do not put a straw in they say the lid makes is “closed”.

Edit: just one of many way to prove it: https://www.thekitchn.com/the-drive-thru-daiquiri-a-weird-yet-wonderful-new-orleans-tradition-241670