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).
Colour Flex Sage Oil-Based Food Colouring 25ml - Vibrant Concentrated Formula for Chocolate, Buttercream, Cake Batter and More by Sugarflair - Vegan, Kosher, Bake-Stable
Edible Food Colouring Mill Sage Oil Based 20ml Cake Decorating Sugarcraft
Colour Mill Oil Blend Food Colouring Sage: Next Generation Oil Based Food Colours - 20 ml
Colour Mill Oil Blend Food Colouring Sage: Next Generation Oil Based Food Colours - 100 ml
The Baked Studio Colour Mill Oil Based Food Colouring *Bulk* 100ML - Buttercream Fondant Sugarpaste Icing and Chocolate Colour (Sage)
Colour Mill Coastal Oil-Based Food Coloring, 20 Milliliters Each of 6 Colors: Blue Bell, Midnight, Ocean, Olive, Sage and Sea Mist