Before first use, place in dishwasher or in boiling water for 3 minutes. This is to ensure hygiene. Immediately after use, disassemble individual top components (e.g. nipple from top or valve from cap). All parts are dishwasher safe (top rack only).
To wash by hand: wash separately in hot, soapy water and rinse thoroughly. Bottle and sleeve may be placed in the dishwasher or boiled without removal of the sleeve. If you wish to remove the sleeve, it comes off best in warm, soapy water. To allow venting and prevent nipple/valve collapse, do not overtighten screw top.
When freezing store bottle in upright position. DO NOT FILL TO TOP. Leave a minimum of 2oz/58 ml of open space from neck of bottle to allow for expansion and prevent glass breaking while frozen.