Where did the red wine slushie come from?

The white wine slushie has its origins in Europe, specifically Germany and Austria.  https://sakeradvantage.com/?p=1277 It is believed that the Germans were the first to add fruit to their red wine, which produced a refreshing and unique  taste. The Austrians then took this concept and perfected it by including ice and other components to create the red wine slushie we like and understand today.