I purchased a set of Aviary Garden Tablemats from LA back in the summer. I opened the box and started to use them 3 weeks ago and they are already warping. I haven't had them in water or near anything really hot. I emailed customer service who have told me that due to length of time they consider it treatment after purchase! What treatment I have yet to fathom but if it includes putting them on a table and placing a dinner plate on top then I'm guilty as charged. What a joke, they are crap quality I wouldn't recommend them to anyone.