YETI Rambler 20 oz Tumbler, Stainless Steel, Vacuum Insulated with MagSlider Lid, Black

This is the greatest tumbler in the world and there is no need to argue with me about it because I am right. It is made from kitchen grade stainless steel that will not puncture or rust. I tested this by punching the tumbler and true to its word it did not puncture, not even close. I also left one outside for a month in my tomato plant and it did not rust at all. The double wall vacuum insulation will keep the contents hot or cold for hours and hours. The MagSlider lid is awesome and uses the power of magnets to open and close. Once you own this YETI cup you will never use another cup again. It is the perfect size for coffee in the mornings that you can then take to work because it will fit nicely in your car cup holder. I prefer to use it as a mixed beverage container so I can sip on something cold and strong on the beach.