While Reverse Osmosis is best way of removing fluoride from your drinking water, you can also use a 3 stage undersink or water filter to remove greater than 90% of flouride from your drinking water.
This three stage water filter system has:
Stage 1 Poly 1 Micron pre Sediment Filter
Stage 2 Fluoride Removal
Stage 3 Superblock .5 Micron Carbon Filter