A close-up view of the iconic red Arby's logo sign against a bright blue sky - Karolis Kavolelis/Shutterstock ...

You'll definitely want to ask for a few extra packs in the drive-thru, or buy a bottle of Arby's Sauce to keep in the fridge at home. Read more: Fast Food French Fries Ranked From Worst To Best We ...

While you can't buy this special edition condiment just anywhere, bottles of Arby's Horsey Sauce are readily available so you can stop stocking up on those little black and white sachets.