We never see Stanley's popular 40 oz Quencher Tumblers go on sale, making this rare discount on them a massive surprise.

Amazon is offering big discounts up to 20% off on Stanley's 40 oz Quencher Tumblers in select colors. The deal also includes free Prime delivery, so you'll save even more.

This Stanley Quencher Sale is extremely rare as we haven't seen a major price drop on the tumblers in over a year on Amazon. Plus, the discount is being offered in some of Stanley's more recent color releases, including Matcha Cream, Seafoam and Mist.

Amazon has even more colors of the 40 oz Quencher Tumbler on sale up to 20% off, including Azure, Frost, Cream, Lilac and Shale.

But because this is a giant price cut on the Stanley 40 oz Quencher Tumbler that we never see happen, we don't expect this deal to last for long. So, if you've been eyeing a Stanley Tumbler but didn't want to pay full price, this is the sale you've been waiting for.