So iLL Liquid Chalk
So iLL Liquid Chalk, Features of the So iLL Liquid Chalk Easy Storage 100 ML Flip-Cap Bottle Fast-Drying Liquid Formula 89% Magnesium Carbonate / 8.5% SD Alchohol / 2.5% Hydroxypropyl Cellulose Safe For Outdoor Use Vegan Bottle Dimensions: 5 3/4in. H x 2 1/2in. W