On May 21st we should have commemorated the frosty pleasure known as a Juice Slush on National Juice Slush Day, which is celebrated annually on the third Wednesday in May. This year, National Juice Slush Day takes place on May 21. Did you know Juice Slush has existed for decades, if not millennia, since it was made by adding Fruit Juice to freshly collected Snow. For centuries, the Royal courts of the world brought down recently fallen Snow from the Mountains and filled the tops with crushed Berries and mashed Fruits. More lately, large brands have taken the lead in producing Juice Slush, which has become popular among kids and…