It's cloudy, fizzy, smells like summer in a glass...but what the heck is it? I don't know what this crazy concoction is, but I love it! Petillant- natural, better known as pet-nat, is a sparkling natural wine that is bottled before primary fermentation and finished without adding secondary yeasts or sugars. There are a variety of different styles of pet nats that determine what they'll taste like but you can guarantee that they'll be fizzy and delicious. Definitely a conversation starter round the summer dinner or picnic table.