Honestly I think Stanley makes good quality products, however I question if the quality of the cups are worth the extra money. I think when it comes to the brand you are paying more for the logo and the "look" than anything. Like many other water bottle and drink cup trends, I think the Stanley one will die out and something new will take its place. For that reason if you are just looking for a quality water bottle or cup to drink out of I would suggest you save your money and purchase a cheeper brand that is just as good of quality. Or do some digging and find one on sale or clearance.
