Where did the red wine slushie originate?

The white wine slushie has its origins in Europe, particularly Germany and Austria.  https://cleardex.io/?p=979 It is thought that the Germans were the first to add fruit to their wine, which created a refreshing and distinct  flavor. The Austrians then took this concept and improved it by adding ice and other ingredients to create the white wine slushie we love and know today.