Made with kitchen-grade stainless steel, so they're puncture-and rust-resistant Dishwasher safe - because no one needs more work to do Keeps cold drinks cold and hot drinks hot until the last sip No sweat design keeps fingers dry Fits in YETI cooler cup holders and most other cup holders Shatter-resistant construction - so give the MagSlider lid all you've got Magnets - make for easy opening and closing Cup holder compatible - sized to be by your side through every road trip and morning