There is an enormous difference between cheap plastic and STRAHL polycarbonate products. The difference is in the detail. Yes, the moulding dies are mirror-finished and polished, bet that is fairly common. What is not common is the fact that only Beyer (German) virgin polycarbonate pallets are used in the moulding process. Once the products have been moulded, they are removed by hand from the moulds and heat treated. This process takes stresses out of the moulding and actually hardens the plastic further. The difference is that the product will withstand 2000 dishwasher cycles, top OR bottom of the dishwasher. The only reason this product will not maintain its glass-like appearance is if you were rash enough to use a scouring pad on them. Suggestion. Only clean them in a dishwasher or a very soft cotton cloth with mild detergent in lukewarm water. The tumblers and wineglasses have a weighty 'heft' which is no accident, either. The actual wall thickness increases slightly as it reaches the base of the container. This transfers the centre-of-gravity of the container lower and is reminiscent of quality drinking glassware. It is quite uncanny. RTM is proud to add the latest stylish designs to our 2014 lineup. Remember, you should not have any actual glass products anywhere near a swimming pool, or on a boat or when travelling. You are only looking for trouble. Up until now we could understand your desire to include stylish drinkware in an al-fresco situation. Now you can without dangerous glass. They are also naturally insulated, so your drinks will stay colder longer. "Unbreakable glassware that looks like real glassware" Our lineup includes tumblers in two styles, white and red wine wine glasses, and 3 beer glasses - two 'Pilsner' style and a 'Stein'. All in crystal clear polycarbonate that you will swear in glass - until you drop one Width : 87.0mm Height : 200.0mm Weight : 230.0g Liquid Volume : 388.0ml Colour : Colourless Type : Wine Glass Material : Polycarbonate Amount of Pieces : 1