Starbucks Green Siren Mermaid Fin Tail Straw Topper Tumbler 24oz NWT This 24 ounce tumbler is a beautiful green color, and features a mermaid scale pattern that shimmers from all angles. The angled straw has a double-tailed mermaid topper attached. This tumbler is for cold beverages. New with tags. Buyer pays shipping. All sales final.