When I take the tumbler out of the box I see some issues with it. There are a few places where it is smooth to the touch but uneven to the eye. There is at least one pit that I can see right off the bat. And it looks like there are a few scratches like I did not get a new one or their qc process needs help.
There is supposeed to be a lifetime (of the original purchaser) guarantee that I will be attempting to use. This tumbler, as is, is not something I would want to use myself and really would not feel comortable using it with company. If this is where the story ends, I do not recommend this product.
As always I received this product at a discount or free in exchange for my honest and unbiased opinion.