I have had this in the bathroom, which has diffused light, since December 2021, and it still has about 2cm left in the bottle. The Spearmint doesn’t have a toothpaste smell if you were concerned about that. It’s more like you’ve trodden heavily on spearmint growing along a shady path.
I only used two reeds in this bottle, and that is more than enough to produce a decent silage, without overpowering the room, or dissipating the liquid too quickly. The bottle is beautiful too.