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Greens Steel Beast 30 oz Black Tumbler Set

Zoltan Baranyo
Created by Zoltan Baranyo
September 19, 2026

The Greens Steel Beast 30 oz Tumbler is a stainless steel, vacuum-insulated cup designed to keep your drinks cold or hot for extended periods. It comes as a set with straws, a cleaning brush, and a pop-up lid. Overall, it aims to provide a complete and high-quality drinking experience.

This tumbler boasts features like double-wall vacuum insulation, ensuring temperature retention, and a sweat-free design. It is constructed from premium 304 18/8 food-grade stainless steel, setting it apart from some competitors that might use cheaper materials. The inclusion of multiple accessories like different straws and a cleaning brush adds value compared to basic tumblers.

The Greens Steel Beast bundle includes two unbreakable straws (one curved and one straight), a straw brush, and an upgraded pop-up lid. The packaging is a gift box, making it suitable for gifting.

Customer feedback is generally positive, with a high percentage of positive reviews. The tumbler's ability to keep drinks cold and its overall quality are appreciated. The Greens Steel Beast aims to provide superior quality and customer satisfaction.

Compared to the Contigo Byron 16oz Travel Mug, the Greens Steel Beast offers a larger capacity (30 oz vs. 16 oz) and includes straws. While the Contigo emphasizes a leak-proof lid and one-handed operation, the Beast focuses on a complete bundle with multiple accessories and a larger volume. Both mugs are stainless steel and vacuum-insulated, but the target use case might differ based on capacity and included features.

When compared to the Sunwill Rose Gold 14oz Travel Coffee Mug, the Greens Steel Beast stands out with its larger 30 oz capacity and comprehensive accessory set. The Sunwill mug, on the other hand, is more compact and focuses on portability with a comfortable handle. The Beast targets users needing larger drink volumes and a complete set, while the Sunwill is better for those prioritizing portability and a stylish design.

We recommend the Greens Steel Beast 30 oz Tumbler for individuals who need a large-capacity, durable, and versatile tumbler. It's ideal for those who enjoy smoothies, shakes, or simply want to keep a large amount of their favorite beverage cold or hot for extended periods. The included accessories make it a great value for money, and the premium materials ensure long-lasting performance.

92
out of 100
Excellent

Our AI read and summarized 81690 reviews to rate this product.

Pros
  • ✓ Premium 304 18/8 food-grade stainless steel construction
  • ✓ Excellent insulation and temperature retention
  • ✓ Includes two straws, a cleaning brush, and a pop-up lid
  • ✓ Sweat-free design
  • ✓ Durable powder coating
Cons
  • ✗ Larger size may not fit all cup holders
  • ✗ No mention of warranty details
  • ✗ Not explicitly stated to be 100% leak-proof
Greens Steel Beast Tumbler Review: AI-Powered Analysis | Cobra Insights