The Sure Grip Beaker Drinking Lid has been specifically designed for use with the Sure Grip range of cups and beakers.This drinking version 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 vacuum inside the beaker which allows the user to control the flow of the liquid and reduces the effort required to suck, even allowing the beaker to be used whilst lying down. The lid is very easy to use and fixes securely into the Sure Grip Beaker giving a watertight seal without the need for screwing in, thus reducing the risk of bacteria gathering in the nooks and crannies of a screw thread.