They're all different

"Each is a slightly different potion, one is a bimbo potion one is a whore potion the other is a free will stripping potion." said the Crone.

"Very nice." said Collos thinking for a moment, he liked the idea of the witches as airheaded bimbos or as fake slutty whores and of them having to obey every command they were given by everyone, but which would he chose.
In the end he settled on one of each.

He would make one sister an airhead, another a trashy fake whore and the other completly obedient to everyone.

Taking the potions he left.

Collos spend the next few days stalking each sister, trying to figure out their routines and when would be the best time to attack them.

He had decided to target each invividually rather than all at once since there was little chance of him successfully getting all three before he was vanquished.

He decided to target Piper first since she had the most consistant routine that meant he could easily catch her when she went to her club in the afternoon to check how things were going before opening.

Blinking into the back area of P3 behind a curtain, Collos stuck his hand in his pocket and pulled out the potions.

"Shit." he muttered to himself, The Crone had forgotton to label them and besides a variation in the tone of blue to each liquid there was no difference between them.

Collos thought for a few minute to see if he could remember which was which but he couldn't so in the end he just peeked out from behind the curtain and threw a random vile at Piper which smashed on her back.

"Ow." she yelled rubbing her back where the vile hit.

"You ok?" asked the barman.

"Yeah." she replied.

"One down two to go." said Collos blinking out.

Which potion hit Piper?