I have been looking for a 1 mug French press and came across this product. I thought since it is not glass, it would last long. Unfortunately after a month and 1 coffee each day, it already has a crack in the bottom. Obviously the crack is not due to overusing. Also I have been washing it only by hand and without detergent. Another minor issue is that the cup gets yellow overtime. I don't recommend this to anyone and I wish I knew how to contact the company and claim a substitute.