It's noticeably different from most of the 'snow' in the streets. It has an oilier lustre, and the smell is not quite the same: ammonia, but touched with oil of roses. There is no indication at all that the stuff is safe. The wisest thing to do would be to dispose of it.
So what will you do?
Game Instructions: This will melt when winter passes! Use it by mid-January.
Wiki note: If you're already at PTPT: Lacre 6 or above, you will not receive any benefit! If your level is lower than 6 when you play this option, you will receive the 3 level boost, and you may surpass the usual level limit (ex: using the monocle at level 4 will take you to 7, and using it at level 5 will take you to 8).
[Player] has invited you to their Lodgings, alone. Are they being forward with you? Is it a trap? Or is it the continuation of a long tradition of friendship?
You will receive:
You watch carefully as [Friend] eats... and then everything goes grey. There was a voice, you remember afterwards, lamenting one lost at sea. When you wake, the world seems wider. It's as if you had opened new senses, but have forgotten their use.
You were with [Player]...you had a pleasant meal... and then everything went grey. You dreamt about stars. And your daughter, lost at sea. Do you even have a daughter? The world seems wider. What did your friend feed you?