Keep a double cup, I like cracking seals
Double cup is a reference to drinking purple drank.
Juicy J loves him some purple drank, in fact, he even dedicated a song to it (which included samples from The Weeknd’s The Morning):
To help improve the meaning of these lyrics, visit "One Of Those Nights" by Juicy J (Ft. The Weeknd) Lyrics and leave a comment on the lyrics box