BPA free liner. USDA Organic. What could be more perfect for your sweetie pie than Pure Sweet Potato? Adding our naturally delicious organic sweet potato as a food supplement makes dinner absolutely nummy! All Nummy Tum Tum ingredients are pure, healthy, and organic. Certified Organic by Oregon Tilth. www.nummytumtum.com. www.facebok.com/nummytumtum. Facebook. Nummy Tum Tum Pure Sweet Potato is intended for intermittent or supplemental feeding only. Pets love it, and it helps support healthy digestion!