Avent Bottles are wider than traditional bottles. This makes them much easier to fill and clean. Avent bottle nipple is designed to only allow air to flow in one direction. This results in less gas for a newborn. Since gas can cause colic, it is very important to do everything you can to eliminate the gas. Another great feature on Avent bottles is that they can be linked to breast pump. When you finish your milk, you can unscrew the pump, and then just screw onto the bottle nipple. Wash your Avent bottles before starting to use it. You must do this even if the bottle is new. A little detergent is all that is needed. Be sure to rinse the bottle before you put milk or formula in the bottle so that the child does not drink soap. Place the nipple and through the round ring. Be sure to pull up tight so it does not leak when you use bottled it. Fill with either formula or breast milk. If you use the formula you want to add a spoonful of the formula for every two ounces of water. Unscrew the ring with the nipple on the bottle. Remember to turn the ring clockwise to tighten and loosen by turning left will it. Feed your bottle or place the lid on for future use. The lid must be placed directly above the nipple nipple otherwise leak when it rolled. You can store the bottle in the fridge and heat when ready to use. Wash the bottle again when you are ready to use it. Remove the ring and pull the plug. Dump excess milk from the bottle. Wash with warm water. Use a brush to get the points cannot be achieved cloth laundry.