Place strawberries, mint, lemon juice, agave, and Chambord in an old-fashioned (rocks) glass and muddle (mash) with a muddler or a pestle. Add the gin, rum, vodka, or soda water, and stir to blend. Stir in 1/2 cup of the crushed ice, and pack more ice into the glass, mounding it well above the rim. Serve immediately.