Potion of Growth
Potionuncommon
When you drink this potion, you gain the "enlarge" effect of the _enlarge/reduce_ spell for 1d4 hours (no concentration required). The red in the potion's liquid continuously expands from a tiny bead to color the clear liquid around it and then contracts. Shaking the bottle fails to interrupt this process.
Source: 5e Core Rules · OGL-1.0a · 5.1