Chop up the raspberries
Begin by roughly chopping up the raspberries. Make sure you select the freshest, juiciest berries you can find, and then wash them thoroughly before chopping them up into large, rough chunks. Do not be too precise with the cutting, as the berries will get pulsed in the blender anyway.
Add ingredients to blender and mix
Put the chopped raspberry chunks, soda water, lemon juice, raspberry juice, and sugar into the blender. The lemon and raspberry juice can easily be obtained from any grocery store, while soda water (carbonated water) is also readily available at any grocery market. Once all the ingredients are in, start up the blender, and pulse on high for 2 to 3 minutes.
Take the raspberry fizzler out of blender
Keep pulsing until the mixture in the blender is absolutely smooth, and there are no large chunks of raspberry left. Once the beverage reaches this consistency, you can either pour it out into a pitcher, or into individual serving glasses. Put the pitcher/glasses in the refrigerator for some time, and allow the drink to chill. Once it is nice and cold, the raspberry fizzler is ready to serve.