the qualitiy of the tumblers is good. I ordered the items and had contact to Anna Yang, this contact was good. But then the contact changed to Helen Li...from this point on the conversation was not really good. I got wrong tracking numbers, I asked for the right tracking numbers again and again. Delivery time was nearly 3 months and this is not acceptable. I was told, that delivery time per ship would be 45 days. I don´t think, that I will order again from this company.