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Here’s an interesting tidbit for thrifty shoppers: Analyzing data from millions of purchases, shopper-rewards app Ibotta found that consumers pay the least for beer on Mondays and the least for wine on Tuesdays, especially compared to the priciest shopping day, Saturday, where people pay 9 percent and 6 percent more for those products, respectively.

Obviously, the price retailers charge for booze doesn’t shift on a daily basis in the same way something like gasoline does. Instead, the data speaks to the behavior of people who buy these products on specific days of the week: Someone buying beer on a Monday is probably putting more forethought into their drinking than someone who is running into a convenience store screaming, “Woo-hoo! Weekends!” on a Saturday afternoon.

“If you’re the kind of person who picks up [wine] on your way to a party you’re probably optimizing for convenience rather than value,” Bryan Leach, founder and CEO of Ibotta, told Forbes. Meanwhile, people who think ahead are more likely to save a buck. “You may make a more deliberate choice,” he continued, “and lo and behold you end up showing up at the party with that bottle of wine for less.”

So the takeaway is a bit more nuanced than we may like it to be. No, simply hitting the wine store on a Tuesday isn’t likely to save you 6 percent on your favorite Nebbiolo. But these statistics provide an interesting lesson nonetheless: If you just try to be a little less impulsive, maybe you’d end up with a bit more dough in your bank account.

Unless, of course, you’re like me, and any bottle of wine bought on Tuesday might not survive until Saturday. Then you’re just blowing through your money by buying more wine. The takeaway there is that you may want to cut back on your drinking.