I bought mine cause my husband steals all the to go cups and doesn't bring them back. So I bought this one thqt says dog mom to deter him from taking it. It's worked so far. No problems with the cup until today. I was cleaning it and the slide part for the lid came off and plastic pieces on the sides of the slide broke off.Leak proof unless you tip over. Used more with cold and keeps ice a long time...maybe 8-10 hours. Like the shape, doesn't tip easily.I like the cup, would have been nice to get everything that was supposed to come with it