For use with the OPTI DROP model.
The Opti filter naturally alkalizes your drinking water to support your bodies delicate pH balance.
Opti's Water filter proprietary blend naturally: 

• Filters about 200 gallons or 3-4 months of filtered water
• Compatible with the OPTI DROPLET dispenser
• Naturally Enhanced Alkaline up to 9.0*
• creates pure, great-tasting alkaline drinking water 
• removes 99.99% of harmful contaminants
• protects beneficial trace minerals to improve your health and wellness.