The truth of the matter is, this doesn't have to be a martini at all. It could easily be a cocktail in a Collins glass with a lemon garnish, or in a hurricane glass with a lemon twist skewered around a raspberry. If using the Sprite/7-Up, they could even be served in champagne flutes. Serve it however it best suits you or your guests. You could serve it in frilly girl glasses AND manly glasses with different garnishes if you're trying to match a color scheme. They are smooth but strong if you use the vanilla or regular vodka instead of the Sprite/7-Up, so don't say we didn't warn you.
Blue Raspberry Lemonade-tini
2 parts blue raspberry vodka
1 part raspberry lemonade
1 part vanilla vodka, regular vodka, or Sprite/7-Up for a spritzer
*If using the lemon-lime soda, do not shake it with the other ingredients and ice. Shake the other ingredients first with ice, and top with the soda.