Costco members can purchase the Gourmet Basics Glass Tumbler 4-pack for just $12.99. Each 18-ounce glass tumbler features a bamboo lid and Tritan straw.
This is a good deal, considering Amazon sells a similar 16-ounce set for $16.99.
Please note that pricing and inventory may vary by location.
Make the most of these tumblers by trying out popular Starbucks drinks that you can recreate at home.
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