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Dark blue round plastic tumbler, 18-oz cup with open top
Dark blue plastic tumbler cup with wide rim, angled view
Dark blue round plastic tumbler cup, front view
Dark blue plastic tumbler cup, side view with rounded base
Dark blue plastic tumbler cup with flat lid on top
Green plastic tumbler with black lid and pink color band
Dark blue round plastic tumbler, 18-oz cup with open top
Dark blue plastic tumbler cup with wide rim, angled view
Dark blue round plastic tumbler cup, front view
Dark blue plastic tumbler cup, side view with rounded base
Dark blue plastic tumbler cup with flat lid on top
Green plastic tumbler with black lid and pink color band

(10 pack) Mainstays - Dark Blue Round Plastic Tumbler, 18-Ounce

$12.00 $15.00( / )
Shipping Free.
Key item features Generous Capacity: Each dark blue round plastic tumbler offers an 18-fluid ounce capacity, suitable for various beverages. Durable Construction: Made from BPA-free polypropylene plastic, these tumblers are designed for everyday use and feature a smooth matte finish. Convenient Dimensions: The tumblers measure 3.50 inches in diameter and...
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Key item features


  • Generous Capacity: Each dark blue round plastic tumbler offers an 18-fluid ounce capacity, suitable for various beverages.
  • Durable Construction: Made from BPA-free polypropylene plastic, these tumblers are designed for everyday use and feature a smooth matte finish.
  • Convenient Dimensions: The tumblers measure 3.50 inches in diameter and 4.75 inches in height, providing a comfortable grip and stable base.
  • Versatile Use: Ideal for both indoor and outdoor settings, these tumblers are perfect for entertaining and everyday dining.
  • Easy Maintenance: For added convenience, the tumblers are microwave and top-rack dishwasher safe.
  • Coordinated Options: Available in multiple color options, allowing for mixing and matching with other Mainstays dinnerware, including matching plates and bowls.

🚚 Free Shipping & 30-Day Free Returns

Enjoy Free Standard Shipping across the USA and 100% Free 30-Day Returns with zero restocking fees.

📦 Shipping Policy

  • Target Destination: We ship exclusively to physical addresses within the 50 United States.

  • Order Processing (Handling Time): 0 to 3 business days (Mon – Fri). Orders placed after 5:00 PM ET or on weekends begin processing the next business day.

  • Transit Time: 0 to 3 business days (Mon – Fri).

  • Total Estimated Delivery: 1 to 6 business days.

  • Tracking: A tracking number will be emailed to you as soon as your order ships.

🔄 Return & Refund Policy

  • 30-Day Return Window: Items can be returned within 30 days of delivery.

  • 100% Free Returns: We provide a prepaid return shipping label for all eligible returns (including customer remorse, wrong size, or defective items).

  • Zero Restocking Fees: We do not charge any restocking or return fees.

  • Item Condition: Must be new, unused, and in original packaging with all accessories included.

  • Fast Refunds: Once inspected at our warehouse, your full refund is processed back to your original payment method within 7 business days.

⚠️ Damaged or Incorrect Orders?

If your item arrives damaged, defective, or incorrect, please notify us within 48 hours of delivery with photos of the item and packaging so we can expedite a free replacement or instant full refund.

📩 How to Start a Return or Inquiry

Returns are accepted by mail with prior authorization. Contact our customer care team with your order number: