A Coke float.
These days when it gets hotter, I still have one for old time’s sake. A tall glass. 3 scoops of ice cream with hypocritical Diet Coke now. It still foams at the top before fully filled with coke which you have to scrape off to consume, before topping the glass with more Coke. Very satisfying, decadent, and a treat retained from my youth.