Instructions for Use: clean before first and every use; before first use separate all parts and place them in boiling water for 5 minutes. This is to ensure hygiene; check all components before each use and throw away at the first signs of damage or weakness; to prevent possible choking hazards, test strength of nipple by pulling on bulb portion; discontinue use if any tear or crack appears; dishwasher safe in top rack (149 degrees F/65 degrees C) but food colorings may discolor components; do not use abrasive cleaning agents. Only soft bristle brushes or soft sponges should be used. Hard scourers may scratch the plastic; all cup parts must be disassembled before heating (especially microwave heating) or cooling. Stir thoroughly after heating to evenly distribute heat. After heating allow cup to cool; sterilize using one of the following methods: steam sterilizing (electric or microwave according to manufacturers instructions), boiling in water for at least 5 minutes or liquid sterilizing solution. After boiling or sterilizing allow all parts to cool; do not leave single bottle parts in direct sunlight or heat, or leave in sterilizing solution for longer than recommended, as this may affect the product function; the trainer is made of polypropylene which is hygienic, easy to clean and relatively soft. Avoid any heavy pressure on it, as this could affect the function; ensure that the holes are not blocked. Do not use a pin or a sharp object to enlarge feeding hold; do no store or use with hot (above 104 degrees F/ 40 degrees C) beverages; store nipples/spouts in a dry, sealed container; to improve the spill proofness after filling we recommend to squeeze the assembled spout underneath the top tightly. This creates a vacuum which prevents leaking. Always check if spout is in the right position (click); the spout will not remain leak-proof, a few residual drops may remain in the spout after drinking. If shaken heavily this small amount may drip out; to avoid injury, do not let baby walk with the trainer; do not let a child take a bottle or cup to bed or self-feed for long periods. Prolonged contact with liquids may cause severe tooth decay; nipple, spout and handles are compatible with all MAM wide neck bottles 5 oz or larger and the trainer. Assembling Nipple: insert nipple into top of bottle screw ring until you hear a click. Place the handles over the bottle neck and screw the nipple onto the bottle tightly. Assembling Spout: insert spout into top of bottle screw ring until you hear a click. Place the handles over bottle neck and screw the spout onto the bottle tightly. Heating Instructions: never pour boiling water into the trainer; never heat or cool a sealed trainer. Remove the protective cap and spout or nipple before heating, especially before microwave and bottle warmer heating. Take extra care when microwave heating; stir thoroughly after heating to evenly distribute heat. Allow the standing time recommended by the microwave manufacturer.