New Hampshire is trying to get people from neighboring states to liquor stores across the border to stock up for summer parties.

From now until Labor Day weekend, out-of-state residents can get discount coupons for purchases at New Hampshire Liquor and Wine outlets across the state.

The “No Taxation on our Libations!” promotion gives residents of Maine, Massachusetts and Vermont a discount equal to double their home state’s sales tax. For Mainers, that means 11 percent off a purchase up to $149.99. This is the first time New Hampshire has offered a discount specifically for out-of-state shoppers. New Hampshire shoppers, and those from outside the three-state region, will get a flat 13 percent off.

“New Hampshire Liquor and Wine Outlets are always tax-free, and this month we want to reward our customers with something extra by giving you our neighboring state’s sales tax back,” the liquor store chain said on a promotion website.

Maine residents can get an online coupon for their purchases. Shoppers are limited to one coupon per day, according to its rules.

The New Hampshire Liquor Commission owns and operates 79 liquor and wine stores. About 50 percent of its shoppers come from out of state, according to the commission. The stores are the sole providers of distilled spirits, but shoppers can by beer and wine at grocery and convenience stores.

Last year, Maine residents made up 7 percent of New Hampshire’s outlet liquor sales, commission spokesman E.J. Powers said. That works out to about $49 million in gross sales, according to the commission’s 2017 annual report.

Four of New Hampshire’s 15 top-selling retail stores are located off a 21-mile stretch of Interstate 95 between Massachusetts and Maine, according to the commission. Stores in Hampton, Portsmouth and Seabrook made $93 million in sales last year.