From Pathfinder Lost Omens Gods & Magic, which isn't enabled.

Mortar of Hidden Meaning

ITEM 4

MAGICAL

Price 75 gp

Usage held in 1 hand

Bulk L

This matching mortar and pestle are made from immaculate duskwood that looks nearly olive in the right light.

Activate 1 minute (Interact)

Frequency once per hour

Effect You use the mortar of hidden meaning to grind tea leaves (or another suitable substance for making a hot beverage). While grinding the tea leaves, which takes no less than 1 minute, you can speak a message into the mortar. After the leaves are steeped in hot water, the first person who drinks from the resulting brew hears the message whispered in their ear.

Pathfinder Lost Omens Gods & MagicOGL