Place your storage container in the freezer to cool it down.
Split the sweetened condensed milk between two separate bowls. In one bowl, stir in the blue food colouring and the pink food colouring in the other.
Combine the glucose syrup with two tablespoons of cream in a small microwave-safe bowl. Heat the mixture five seconds at a time until it's just warm, then mix well.
Pour the remaining cream into a different bowl or a stand mixer. Mix at a low speed and gradually incorporate the warm glucose syrup mixture and the cotton candy flavouring. Increase the mixer's speed and continue whipping until the cream forms stiff peaks.
Evenly distribute the whipped cream into the two bowls of coloured condensed milk. Fold it in gently to maintain as much air in the mixture as possible.
Layer the two mixtures in your chilled storage container. Alternate adding a bit of each to mix up the colours a little. Seal the container and freeze for at least four hours or until hardened.