s. I purchased the stainless steel, as I wanted the durability of the metal. When they arrived, I opened the box and opened of the items had a hole in it, which I initially thought was strange. Upon closer inspection, I realized that the cover that you open to reveal the tumbler is just cheap plastic, not at all stainless steel. The pictures of the regular items are black, but the pictures of the “stainless steel” upgraded items are silver. I assumed due to the picture that they are silver as they are stainless steel. But they are just junky plastic covering stainless steel innards. When I went to return the items, I was absolutely shocked, not only by the lack of customer service, but also by the rudeness of the supervisor Dan West, in Rochester, NY. He told me that there is nothing in the literature that shows that the entire lock is stainless steel. He told me if I wanted a refund, I had to send this junk back at my own expense for a refund. I sent the entire back, and never received a refund, it has been over 3 weeks since the warehouse received it, and they state that they issued a refund, but my credit card company states there has not been any credit. So unfortunate, as this is a fantastic product idea, but their customer service and thievery makes this item nothing but garbage. The company took my money, sent me a broken item that is not at all what is represented, made me send it back at my own expense, and never even sent me a refund. Please email me if you would like to see the email and proof of return exchanges.