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Siren Cup
Siren Cup

Siren Cup


    Our Siren Cup is the most gorgeous way to say NO to single use plastic cups and help save our lakes, rivers & oceans!

    Features include:

    • 22 ounces
    • Made from the highest food grade stainless steel
    • Lead free
    • BPA free
    • Built in Silicone Silencer
    • Easy to clean
    • Double wall vacuum insulated to keep your beverage cold/hot for 12+ hours
    • Twist top
    • Reusable


    Mermaid Straw is a supporter of Plastic Bank®, an organization committed to stopping ocean plastic while improving the lives of collectors in vulnerable coastal communities. We proudly donate 1% of our gross sales to Plastic Bank every month. Learn more.

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    Customer Reviews

    Based on 13 reviews
    Ansleigh Reese
    Love the cup but

    I love everything I ordered from mermaid straw. The only issue I had was the netted paper used to wrap the cup left fibers on the silicon piece on the lid. A little difficult to get off but other than that absolutely loved everything

    Kurstielyn Robichaux

    Love it so much! Amazing quality

    Thank you so much!

    Beautiful cup - tough design

    The cup itself it gorgeous. Love the size. Easy to carry. However, the design could use some work. It took me about 15 minutes (and multiple routes) to unscrew the top. I thought it was a one-time thing, since it was brand new out of the box. Nope. Every time I've used it since, it is near impossible to unscrew. Disappointing. :(

    Jennifer Wyman
    Best cup I own

    This cup keeps my ice cold for a long time. I quite enjoy it and would definitely recommend it to others. Thank you so much mermaid straw!! I’ve already made another purchase for a Christmas gift and will be showing up soon. The shipping is great and efficient.

    Thank you SO much for your support, Jennifer! We're so glad you love your cup!

    chloe bloor

    Was bigger than I originally thought but love it
    It got to the uk a lot quicker than I thought and the shipping wasn’t bad. Will hopefully purchase again sometime