Rambler 16-Ounce Stackable Cup

I really love this cup. I had very specific requirements: I wanted a 16oz cup that was dishwasher safe, easy to clean (wide mouth, lid with removable parts), that could function for hot or cold, that came with or had an option to purchase both a hot lid and a lid with a straw, and that could function without a lid at all (like for a beer). This cup meets all of the requirements, plus it’s very durable and the colors are bright and attractive. I was able to get rid of a lot of inferior cups, so my cabinet is less cluttered, too!

I bought this a couple of months ago. It does a decent job keeping my coffee warm, though not really hot, for around 4 hours. However, my main concern is the splash-resistant feature. It doesn’t seem to work as expected. When I walk while holding the tumbler, coffee tends to spill out. Even when the MagSlider is fully closed, liquid still leaks through. I’ve even had to place a napkin on top just to absorb the spillage, which defeats the purpose of having a splash-resistant lid. I’m not sure if mine is defective, but the slider feels a bit loose. I hope this can be improved in future versions to make the lid more secure and truly splash-resistant.