This potion's Transparent liquid has floating in it a sliver of fingernail from a Cloud Giant.

The round bottle appears nearly empty, aside from what looks like a thin, white thread that floats and bounces against the edges of the glass. When you swish the potion to and fro, you hear a gentle, faint sloshing of liquid.

I Drink an Potion of Cloud Giant Strength
I slosh the fingernail floating within this transparent potion, noting that it’s rather well-manicured. I drink it down in one swift gulp, the nail sliding down to my stomach like a long string of hair. That unsettling sensation turns to one of lightness, as refreshing cool air fills my lungs. My chest swells with new strength, as do the muscles of my arms, back and legs. I feel weightless and immense, as if I could crush entire settlements with a gentle press of my hand.