The Subo straw spout is made from food grade silicone. It is a soft mouthpiece that has a 5mm diameter opening that allows for thinner type foods like purees, plain yogurts, and rice cereals.
It is interchangeable with the original spout that comes with The Food Bottle. One size fits all.
Subo comes with a 12mm spout which is great for all food types, however we do recommend for children under 2 years old, you also purchase the straw spout.