Rambler 20-Ounce Stackable Cup

I bought two YETI 20 oz Stackable Cups for my wife and me, expecting the quality YETI is known for. Unfortunately, the lid does not prevent liquids from spilling, which was a major disappointment. I also own a YETI backpack that has a designated pocket for a cup or bottle. I placed the stackable cup there, assuming it would be safe for everyday use. Instead, my coffee spilled all over the inside of the bag, making a mess and soaking the backpack. This is especially frustrating since this is the bag I use to carry my laptop and other equipment. The cup itself feels well-made, but the lid design makes it unsuitable for carrying liquids in a bag. For a premium-priced product, I expected better spill protection especially when used with other YETI gear.