Toughening processes increase both the mechanical strength and thermal shock resistance - the two biggest factors that affect glassware performance in a foodservice operation. Mechanical strength is the ability to withstand impact and resist scratches, tiny abrasions, and flaws that weaken the glass. Even small nicks and scratches that you can't see can affect breakage. Thermal shock resistance is the ability to withstand sudden shifts in temperature. Glass is a poor conductor of heat. Every 1° change in temperature adds 25 lbs. per square inch of stress to a glass.
So what's the difference between DurTuffing and tempering? Libbey's exclusive processes were developed not only to reduce breakage and chipping, but to also change how a glass breaks - an important safety consideration in foodservice operations. Fully tempered glass is unstable, and can shatter in an explosive manner. It breaks into smaller jagged pieces that can travel long distances, potentially contaminating ice bins or salad bars, shutting down production for a period of time. The need for product replacement due to breakage and chipping affects your bottom line. Libbey's toughening processes produce glassware that stands up to more servings which means more profits for you.
Libbey's DuraTuff® treatment is a super strengthening thermal alterprocess for "pressed" tumblers and stemware. The process is performed only on the upper portion of the glass, increasing its resistance to thermal and mechanical shock. Treating just the upper third of the glass at a lower temperature than tempering puts less stress on the glass and positively affects how the glass breaks as well as improving the overall durability. This process produces some of the most durable glassware in the industry.
Country of Origin
Made in USA
Manufacturer Part Number
3-5/8" max. dia. x 2-1/2" bot. dia. x 6-3/4" h.
Product Weight (lbs)
Unit of Measure
Case of 12
Awesome Glassware Review by DogMom
After replacing my glassware and servingware nearly every year, I finally got smart and purchased a large set of plates/cups/etc from a Restaurant Supply Store and they wear like iron, are white so everything looks good on them. I was looking for glassware to do the same thing and found these lovely glasses at Ace Mart, I love them! (Posted on 8/28/2012)
Wonderful! Review by zillabreeze
Purchased as a gift for my sister - was tempted to keep them myself. Good looking and very heavy! (Posted on 1/3/2012)
More than "Casual" quality Review by PV Knitter
Nice and large for our family who drinks lots of lemonade! Great for those beer or tonic drinkers. Holds a lot and is durable. We're not afraid to take them by the pool. Nice weight and comfy to hold. Highly recommend! (Posted on 8/9/2009)
Just what the drink ordered Review by Shark
Good basic glass. Excellent for iced tea and other cold drinks. Large enough for plenty of ice and yet hold a real drink especially when out on that hot deck... (Posted on 7/9/2009)
Excellent Purchase Review by MJ
[...] Have a beachy look to them; just what I needed. Couldn't have asked for better. (Posted on 6/7/2009)
durable and beautiful Review by shoppinglady
Our family of five apparently experiences strong pulls of gravity when handling glass. I've tried the "non-breakable" plastic, but after 2 different sets, they became clouded. One of my friends suggested I try glass again even though my children have a tendency to drop them. But I figured if these are durable enough for a restaurant, they've got to be able to survive in our house. These glasses have great weight, they've endured our very powerful dishwasher very well, they are beautiful and I could not be happier. BTW for those living in Houston, the dozen was cheaper in the store, than online. Nice surprise. Just wish they had a smaller glass to match! (Posted on 4/30/2009)
Quality Glasses Review by snclz
I am quite impressed with the quality of the glasses. They are made of thick glass and exceptionally easy to hold on to. (Posted on 12/31/2008)