The lid doesn’t leak, despite having an extra opening to sip from Stanley’s insulated stainless steel tumblers are praised for their quality and temperature regulation Price and other details may vary based on product size and color. We tested 13 insulated tumblers (including stanley) to find the eight best ones for smooth sipping We also evaluated if they leaked and their cold retention. If you’re looking for the ice retention and gorgeous design of a stanley cup, but crave the practicality of a more traditional water bottle — meet the stanley quencher tumbler with the protour flip straw lid.
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