Nexba Strawberry & Peach Kombucha Drink 1 Litre. Our products are naturally sweetened by Goodsweet, our all-natural, plant-based blend of stevia leaf extract and erythritol. Our delicious and all natural kombucha is made with a unique strain of live culture, specially built to survive the journey from your mouth to your gut. Here's to living life full of good gut health and feel good vitality, naturally!