Yes

"Oh no, dude, you got the wrong idea! This isn't jungle juice. It's Russian punch. It's like jungle juice but it has to have enough vodka to knock you on your ass. Hence the 'punch'," you lie.

"Oh. Well, I guess that makes sense. Still seems like a lot of vodka for a mixed drink," he replies.

"Trust me, bro. This shit is good. Try it out and thank me later, dude," you argue.

"Alright, dude, whatever you say. This is gonna be a wild party!" The guy says, scooping a cup and leaving.

It worked! You finish your trap and sneak back out of the kitchen. You quickly hide amongst the crowd and observe Tori and Derek. As the night goes on, you see Derek take several trips to the kitchen. The first time, he brings back some of your sabotaged jungle juice for Tori. You smile as she winces at it and sets it down. Refusing to take more than a sip of it. After that, Derek just got drinks for himself and water for Tori. This means that about 2 hours into the party Derek is stumbling around like an idiot and Tori is sober and miserable. Your plan is a success!