Universal Fits Most Wide Mouth Bottle Openings. The Splash Guard Is A Plastic Insert Which Provides A Smaller Drinking Hole, Blocks The Splash, Is Easily Removed For Cleaning And Is Dishwasher Safe. Allows For Easy Filling Without Removing The Splash Guard.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }