KindGlazeFiringLow fire, Cone 06–04MakerSpeedball
Food safety depends on the clay, the application and your kiln. Treat any maker's claim as a starting point and test your own work before using it for food or drink.
Photo and details from speedballart.com.
From the supplier
LineGlazes + UnderglazesOpacityTransparentColorsclear
On real work
No public pieces use this glaze yet. Log a piece with it and yours will be the first.