Florentine flask

The liquid runs into the florentine receiver where the water and essential oil phases separate.

[1][2] This kind of florentine has to be airtight to reduce the loss of volatile substances.

[3] The other type is intended for oils that are denser than water, where the oil accumulates beneath the water phase, for instance cinnamon, wintergreen, vetiver, patchouli or cloves.

[2] The floating water phase avoids the loss of volatile compounds from the oil.

Larger glass receivers with base are called florentine flasks or essenciers.