Polypropylene Disposable Plastic Glasses are commonly known as ‘flexi’ tumblers as they can be bent and their shape manipulated. They can appear ‘cloudy’ and are not as clear as their Crystal Styrene counterparts. Polypropylene glasses are commonly used at festivals, outdoor sporting events and public houses as they do not shatter, are cheap and would be difficult to use as a weapon.
Most Polypropylene Tumblers found in the UK are vacuum formed which means that plastic is stretched over a cup shaped mould in order to manufacture the tumbler. A good example of this is our Vending and Non Vending Plastic Cups commonly used or found with Watercoolers, Vending machines and next to the dreaded dentists’ chair.
Vacuum forming a tumbler (stretching plastic over a mould) results in parts of the tumbler being thicker than others, usually the base and top of the tumbler has a higher concentration of plastic than the thinner side walls.
For this reason we do not sell vacuum formed plastic glasses over a certain size. Vacuum formed tumblers are better suited to ‘one glup’ small tumbler applications as large Pint Glasses can become ‘wobbly’ and difficult to handle.
You’ll recognize when you have been handed a pint of beer in a vacuum formed tumbler when the beer spills over the side of the glass and onto your hand as you have ever so slightly squeezed the flimsy tumbler (altering the capacity) and forced the beer out of the glass.
Our ‘Katerglass’ range of Plastic Pint Glasses are Injection Moulded which gives ‘uniform wall strength’ – the tumblers are more rigid, not thinner in the middle and generally easier to handle.