Limoneira Co. is promoting lemons through a contest with a hot dog fast-food chain.

The contest highlights National Lemonade Day (Aug. 20) through August. The Santa Paula, Calif.-based Limoneira’s promotion takes advantage of Hot Dog on a Stick’s notoriety for fresh-squeezed lemonade.

To partipate, diners who buy any size lemonade at Hot Dog on a Stick upload photos of their receipts to Limoneira’s Facebook page and post why they like the fast-food chain.

The winner of “best post” receives Apple iPad and will be featured in a video.