[gruez]

I don't think I've ever seen a wax takeout container. Prior to the current wave of "compostable" containers, takeout containers were either something non-paper backed (eg. styrofoam or plastic), or something that resembled a paper cup (which uses plastic not wax, because wax gets melted by hot food/drinks).

[anonymouskimmer]

Waxed cups are still sold for cold drink use: https://www.webstaurantstore.com/search/wax-paper-cups.html

I remember them being pretty common. But that has probably changed over the years as you indicate.

[RajT88]

Still a thing, but no longer the default. Weird too - wax paper cups were fine. I assume, just more expensive to make. Now it's the red plastic solo cups which are the default.