UPDATE - These are still like new after 6 months of daily use. They retain heat and cold for hours on end. No condensation. No rust like others reported. Take note of the photos. The hole you use to sip through is just a hole to sip through. It does not close or seal, if that is what you’re looking for you probably don’t want these. I like these lids because I use them with the straws.So…if you’re not a sucker for Stanley, YETI, HydroFlask, and others, you’re going to love these 20oz stainless tumblers! I bought the 4 pack. These are SOLID! They are better quality than I expected. They are clean and classy looking especially with the matching stainless steel straws from Amazon too. They fit through the lid of this tumber perfectly. The lid is also SOLID with a nice tight fit. It does not spill open if it gets knocked over - just a couple drips from the hole you drink through. Stainless goes with everything. It is double walled/insulated; keeping my hot drinks HOT, and my cold drinks COLD. NO CONDENSATION or SWEAT left on your counter or desk. These are awesome and look so good! Treat yourself to these and get those straws by StrawExpert on Amazon too.Brand: StrawExpert4.7 4.7 out of 5 stars 51,344 ReviewsStrawExpert Set of 16 Reusable Stainless Steel Straws with Travel Case Cleaning Brush Silicone Tips Eco Friendly Extra Long Metal Straws Drinking for 20 24 30 oz Tumbler