This is because all water-based materials have been removed and replaced with bake & cake friendly oils; these oils mix through much better than water-based gels (which we know water repels from the oils in your baking).
Sugarflair Mustard (Yellow) Oil Based Food Colouring, Highly Concentrated Edible Oil Based Blue Food Colour for Consistent Colouring of High Fat Foods: Icing, Buttercream, Chocolate & More - 30ml
Colour Mill Oil Blend Food Colouring Mustard: Next Generation Oil Based Food Colours - 100 ml
Colour Mill Food Colouring - Mustard - Water Based Food Colouring Liquid - 20ml - Ideal for Cake Baking and Decorating - Vegan Food Colouring - Gluten Free 20ml
Mustard - Water Based Food Colouring 20ml
Colour Mill Oil Based Food Colouring Red - Next Generation Oil Based Food Colouring for Baking, Decorating, Icing and Cooking Food Dye DIY Slime and Crafts - 100 ml
Colour Mill Oil Based Red 20ml - Next Generation Oil Based Food Colouring for Baking, Decorating, Icing and Cooking Food Dye DIY Slime and Crafts 20ml