For packing a bit more than your average insulated bottle, high-quality 40- and 64-ounce Roamers from S’well are some of the best vessels to take on your camping and picnicking needs. These growlers are perfect for wine or beer, promising to keep a beverage cold for 24 hours or hot for 12 hours. S’well products very rarely go on sale, but now they are available on Prime Day at discounts as high as 37% off, depending on the color and size you choose.
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