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.
Dimensions: 6 7/8" x 3 1/2" Made from 18/8 stainless steel Double wall vacuum insulation Dishwasher safeBenefits Shatter resistant construction MagSlider lid locks contents in Kitchen grade stainless steel that is puncture and rust resistant Keeps drinks hot or cold until the last sip