In the Napa Valley. Family owned since 1935. Don't forgetta Mezzetta! Family owned & operated. Fine quality since 1935. What I love about Castelvetrano olives is their amazing crunch and buttery flavor. I first encountered them in Italy - then couldn't wait to get home and share them with friends. At Mezzetta, we believe in sharing joy. We pour our hearts into what we do so we can share the best of the world in all its richness and color. I hope sharing these special olives with your loved ones adds a little more joy to your day. Share the joy! - Jeff Mezzetta. Wonder what else you can do with these delicious olives? Visit mezzetta.com for tips and recipes. Non-GMO. Cholesterol free. Gluten free. Vegan. No preservatives. Please recycle. Product of Italy.