Yeah I should’ve clarified (pun intended). They had glass in the ancient world especially in Rome and Egypt but it was basically super heated sand and color additives put in a mold and often looked opaque and kinda lumpy. Even if it was blown like it was in some regions it wouldn’t have looked like modern glass.
Clear blown glass like you’d see a modern scented candle contained in wasn’t invented until the late Middle Ages and certainly wasn’t mass produced until the 1500s and even then places like Venice that had knowledge of these techniques literally forbid their glassmakers from leaving their city or region so other people couldn’t make it, forcing artificial scarcity and making it a very expensive material.
So if you showed a yankee candle to an Ancient Greek, especially one from a city or something, they’d be like burning scented wax okay not something I’d do but it makes sense. Also how the fuck is that glass transparent.