Consider using an ice cream maker. If you don't need to look at the Italian ice and scrape it periodically, you can also freeze it within an ice cream or gelato maker. Rainbow icecream is also his most loved so I get your struggle. We plan to make this recipe https://groo-vape-flavours11326.shotblogs.com/the-smart-trick-of-thc-22-28-that-no-one-is-discussing-48987199