Review on Double Insulated 32-Ounce Hospital Mug by William Mathis

Made in America. Just received but great first impression. Double walled and looks like it will last. The manufacturer says it can be washed in the dishwasher. The plastic appears to be polypropylene which should hold up better if dropped than the double wall plastic jars I've used. Mason jars, despite being polymer, will break off to the bottom if they fall off the counter. Even though they aren't glass, they break. These cups appear to be much more tolerant of "abuse". Only 4 stars for tightness as the lid is held in place by friction/pull, not screwed, so I'm sure the lid could pop off if dropped. Still good design and product. Two volume marking scales; One counts up and the other down. Did I mention this is an American production?