Greens Steel Beast 30 oz Tumbler
Royal Blue
Price as of 2026-08-11. Check Amazon for the current price.
Quick Decision
Is This Right For You?
- •Buyers who prioritize quality over price in thermoses
- •Those who want a top-rated option — in the top 1% of thermoses by rating
- •Risk-averse buyers — 81,381+ reviews give a highly reliable picture
📊 Based on data analysis of 1 products in this category.
Mubboo Score: B+
How we calculate the Mubboo Score
Quality (45%): customer rating, normalized to a 10-point scale
Popularity (35%): review volume vs the category leader, log-scaled
Value (20%): price position vs other thermoses
Computed from live Amazon rating, review count, and price across 1 thermoses available to US consumers · last refreshed 2026-08-11.
What buyers say about thermoses
Themes from buyer reviews across this category — not review data for this specific model.
These thermoses excel at temperature retention and durability, but check the lid seal for potential minor leaks and note that larger sizes may be heavy when full.
- Excellent insulation keeps drinks hot or cold for long hours
- Leak-proof design gives peace of mind during transport
- Durable and sturdy construction withstands daily use and drops
- Convenient size fits cupholders and is easy to carry
- Occasional leaking from lid or spout
- Some models can feel heavy or bulky
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Bottom Line
Greens Steel Beast 30 oz Tumbler earns Mubboo Score B+. Priced at $25 — a premium option, below the category average of $25. Rated 4.6/5 from 81,381+ reviews. Strong buy if: buyers who prioritize quality over price in thermoses, those who want a top-rated option.
Frequently Asked Questions
Is the Greens Steel Beast 30 oz Tumbler worth buying in 2026?
It earns a Mubboo Score of B+, with a 4.6/5 rating from 81,381 reviews — better than 100% of thermoses we track.
How much does the Greens Steel Beast 30 oz Tumbler cost?
It is currently $24.99 — premium-tier pricing for thermoses.
Sources & References
Products available through US retailers. Prices in USD. Sales tax varies by state and is not included.
Mubboo may earn a commission on purchases made through affiliate links. This does not affect our Mubboo Score, product rankings, or editorial judgments. Prices are accurate as of the last sync (2026-08-11) and may change.