Sam:
Now, red solo cup is the best receptacle
For barbeques, tailgates, fairs, and festivals
And you, sir, do not have a pair of [bad word] If you prefer drinkin' from glass

Mike:
That's [bad word] 

Sam:
Hey, red solo cup is cheap and disposable
And in fourteen years, they are [bad word] And unlike my home, they are not foreclosable
Freddie-Mac can kiss my [bad word] 
Finn:
Whoo!

Sam with New Directions:
Red solo cup (Aha)
I fill you up
Let's have a party
Let's have a party
I love you, red solo cup
I lift you up
Proceed to party
Proceed to party

Sam:
Now, I really love how you're easy to stack

Finn:
But I really hate how you're easy to crack

Sam:
'Cause when [bad word] down in front of my pack

Finn:
Well, that, my friends, is quite yucky

Sam:
But I have to admit that the ladies get smitten
Admirin' at how sharply my first name is written
On you with a Sharpie when
I get to hittin' on them to help me get lucky

Sam with New Directions:
Red solo cup
I fill you up
Let's have a party
Let's have a party
I love you, red solo cup
I lift you up
Proceed to party (Finn: Proceed to party)
Proceed to party (Finn: Proceed to party)

Sam:
Now, I've seen you in blue and I've seen you in yellow
But only you, red, will do for this fellow
'Cause you are the Abbot to my Costello
And you are the [bad word] to my Loom
Red solo cup, you're more than just plastic
You're more than amazing,
you're more than fantastic
And believe me that I am not the least bit sarcastic
When I look at you and say:
"Red solo cup, you're not just a cup

Quinn:
Mhmm!

Tina: 
No way, never

Finn:
God, no!

Sam:
You're my-you're my (Finn: Friend?) friend

Quinn:
You're my friend

Finn:
Lifelong

Quinn:
Uh huh

Sam:
Thank you for being my friend"

Sam with New Directions:
Red solo cup
I fill you up
Let's have a party (Finn: Let's have a party)
Let's have a party (Finn: Let's have a party)
I love you, red solo cup (Finn: What up? What up?)
I lift you up
Proceed to party
Proceed to party

New Directions:
Red solo cup (Sam: Red solo)
I fill you up
Let's have a party (Sam: Let's have a party)
Let's have a party (Sam: Let's have a party)
Red solo cup (Sam: oh, red solo)
I lift you up
Let's have a party
Proceed to party (Sam: Yeah!) (Quinn and Tina: Solo cup)

Finn with Quinn & Tina:
Solo cup, solo cup
solo cup, solo cup (x2)