Reviewed by Paul - 9th Dec, 2019 Absolute rubbish I bought three of these thinking that they would be a nice idea for my wife and kids but actually they are not really as good as I imagined. When you tighten down on the lid, the O ring squidges completely out from between the lid and the body and so there is no waterproof seal at all. The only way to get it to work is to put absolute minimum pressure on the lid which means that the lid unscrews itself in daily use and you loose the piece with the £20 note in it. I took it up with True Utility by email and they just fobbed me off and as I have opened the packaging they wont take them back.