as my drinking has been getting out of hand of late and my good lady has been voicing her concerns i got this glass so that i can limit myself to one glass per night thus keeping myself healthy and within government guidlines. one glass of wine is equal to 2.5 units. as i am allowed 21 units per week that is around 8 glasses. i cant believe that all i had to do to get under the guidline recommendations was to buy this wine glass. it is for these reasons that i heartily recommend you buy this glass, it is a win win situation, i can now get bladdered safely and keep my wife happy at the same time. 5 stars