There is, but the prices are inflated. If you walk down to the Kukulcan Plaza, you will find a grocery store upstairs that will serve you better. It's about a 12-minute walk. I take a backpack as my carry-on bag when flying. I use it after we get to Lagunamar to carry groceries (and beer) back from the store. I have also seen people using regular wheely carry-ons to bring back the groceries they purchase. There is also a La Europea that is closer...across the road and down about 3 blocks. Wide wine and liquor selection at good prices, with some beer, snacks, and a deli counter for cheeses and meats (and baguettes).