The sterling silver ring has a small secret compartment. It closes with a latch and is perfect for pill or other tiny things. A poison ring or pillbox ring is a type of ring with a container under the bezel or inside it self that could be used to hold poison or another substance. Ring like this have been used throughout history to carry perfume, locks of hair, devotional relics, messages and other keepsakes, so they have also been know by other names