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Siren Glass Cup
Siren Glass Cup

Siren Glass Cup


    WE ARE REDESIGNING THIS PRODUCT - Restock will take some time but will be worth the wait! Be sure to click 'NOTIFY WHEN AVAILABLE' to keep up to date! 

    You can purchase this current design as an OOPS product!

    Our Siren Glass Cup is perfect for those looking for an alternative to our stainless steel cups and bottles. Say NO to single use plastic and help save our lakes, rivers & oceans from needless plastic waste!

    Features include:

    • 25 ounces
    • Bamboo top with built-in black silicone silencer
    • 3/4 black removable silicone sleeve 
    • Made from durable borosilicate glass
    • Leakproof
    • BPA free
    • Easy to clean
    • Reusable

    *The lid for our glass cups is made from natural, untreated (chemical sealant free) bamboo material. For care and cleaning instructions, see the "Care/Cleaning" section on our FAQ page here


    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
    Will there be more siren glass cups

    Will you bring more of them soon?


    I absolutely love this bottle, I got the siren one and it's so sleek. I love it. I do have an issue with the cover, I took off the silicone to clean it and now I can't get it back on.. 😅 but I still love it. I can't wait for a restock so I can get other colors!

    Love this cup

    I recently bought this cup in black and I fell in love with it and would use it everyday. I was very sad when it broke yesterday. I placed an other order on Friday so I can't wait for it to come. I want another black on to replace the one that broke but it's sold out. It's a little sad that my cup broke less then a month of me having it. I still love the product though.

    Duchess Kekua
    Siren glass cup

    I love it! My favorite cup to use for all my drinks & my daughters are all obsessed

    We're so happy to hear it, thanks so much for your support!

    Cambree Spurlock
    Love these products!

    Great high quality products that are also too stinking cute! Not to mention the amazing cause! Will definitely buy more!!!