Dry between use: Removes moisture from your personal hydration reservoir, keeping it dry, clean, and sanitary between uses. Save your gear: Eliminates moisture and extends the life of your hydration reservoir. Subtle yet effective: Silently dries hydration systems overnight, all while using less electricity than a standard light bulb. Safe for all materials: Safely and effectively dries all types of reservoir materials. Fits reservoirs with 3-inch or larger openings. 5-year warranty: We're confident that your PEET Dryer will exceed expectations for years to come. Register your PEET product within 10 days of purchase to take advantage of our warranty.