One of my friends made jello shots for a party because he had to do some
"fundraising". For those, he used vodka, and they tasted fine; however, we
had some left over jello and used some Bacardi. With the lemon jello we used
Bacardi Limon and with the orange jello we used Bacardi O-the flavored rum
enhanced the jello flavor, but it hit us pretty hard. You could also use
Bacardi Razz with any raspberry flavored jello.
Just remember that you still need to add some water, otherwise the jello will
not solidify, as alchol does not freeze. Depending on the water to alcohol
ratio, you may need 24 hours for these to take shape. Plan accordingly and
good luck.