The Non Spill Cup has been very cleverly designed with deep contoured grooves all the way around it, making it very easy to grip securely for users, even those with a weak grip or small hands.The lid on the drinking cup has a 4mm wide drinking spout which is perfect for use with both hot and cold fluids. A clever valve in the top of the lid helps to create a vaccuum inside the cup which allows the user to control the flow of the liquid and reduces the effort required to suck, even allowing the cup to be used whilst lying down. The body of the Non Spill Cup is made from a very strong high quality plastic (that contains no PVC), and as such are almost unbreakable. This drinking cup is designed with an angled spout to facilitate easy use for all types of users and is an excellent all round drinking aid . The cup is microwave and dishwasher safe up to 130ºC degrees. This product is available in a wide range of colours and spout sizes, all available on this site.N.B. Please note that the cups \"non spill\" description relies upon the correct use of the valve in the lid. By the very nature of the fact that there is a hole in the top, leaks will occur in certain circumstances.