Wine. Surprised? The region is known for some unique white varietals, including some notable Pinot Grigios. The available reds are also quite flavorful, so don't avoid them completely. Several of these wines may not be available outside of Italy, so sample liberally while you can.
Some shops offer locally produced Limoncino Limoncello, so if you'd prefer a cordial you will have some options.
Of course you'll have plenty of non-alcoholic options if you're driving really, you shouldn't be or boating better idea that day. Soft drinks and water are readily available and the afternoon coffees and cappuccinos are very good.