VANILLA ICE CREAM: Fill about 1/3 of the glass with Sprite. Add 1 drop of green food coloring and gently stir with a spoon.
Add 1-2 c. vanilla ice cream and continue to fill the glass up with Sprite.
Place a straw in the glass to serve.
LIME SHERBET: Place 1-2 c. lime sherbet in the glass right after coating the rim.
Fill the glass up with Sprite. Serve with a straw.