In a medium saucepan over low heat, whisk together the sweetened condensed milk and half-and-half.

Stir continuously for 5 minutes until the liquids are fully integrated and warm to the touch, but do not allow the mixture to boil.

Remove the pan from the heat source immediately.

Stir in the vanilla extract, almond extract, and butter extract until thoroughly combined.

Allow the creamer to cool completely to room temperature.

Stir in the rainbow sprinkles.

Transfer the mixture to a sterile glass jar or airtight container and refrigerate before use.