Shopping carts are seen stacked in a vacant parking lot outside of a Costco in Wheaton, Maryland, US, May 18, 2020.

Instacart will start selling ads to food brands on its Caper smart shopping carts, including ones tailored to shoppers' buying habits.

The smart-shopping-cart company Veeve has partnered with some top retailers, including Kroger and Albertsons.

No, it's not actually a hidden message to our grocery-shopping rabbit overlords, but it does make for a decent conversation starter over Christmas dinners and New Years parties.