In addition to Skittles, I have also recently done:
Fox's Glacier Mints - my GF thinks it's like mouthwash, but I like it
Wurthers Original - just like Baileys, but with a bigger kick
Blackjacks - awesome
Fruit Salads - not quite as good
Also, get yourself a couple of packets of the cheap Tesco Cola Bottles, and place them in a tub along with vodka - the Cola Bottles will absorb the vodka, and mine grew to about twice their original size in just a couple of days. They initially taste just fine, then you get the sudden hit from the vodka.