Potion of Diminution

Source: Dungeon Master's Guide (2024)

Potion, Rare

When you drink this potion, you gain the “reduce” effect of the Enlarge/Reduce spell for 1d4 hours (no Concentration required). The red in the potion’s liquid continuously contracts to a tiny bead and then expands to color the clear liquid around it. Shaking the bottle fails to interrupt this process.