Owala FreeSip 40oz Insulated Tumbler with Dual-Sip Spout
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🔥 #80 in Insulated Tumblers · New Best value 40oz insulated tumbler
IRON °FLASK Co-Pilot 40oz Insulated Tumbler with Flip-Cap Lid
IRON °FLASK 3.6
#80
in Insulated Tumblers
$18.99 →
As of Jul 8, 2026
AI-estimated. See how we score. How we score Affiliate link — we may earn a commission
01 / Spec
Top features
Capacity40 oz
InsulationDouble-wall vacuum-insulated stainless steel
Material18/8 stainless steel
The IRON °FLASK Co-Pilot is a 40oz double-wall vacuum-insulated stainless-steel tumbler designed for all-day hot and cold beverage retention. It features a flip-cap lid with straw, leak-proof construction, and a standard cup-holder-friendly base. Built from 18/8 stainless steel with a durable powder-coated Rose Gold finish.
Key features: Keeps drinks cold for 24+ hours and hot for 12+ hours; includes reusable straw; dishwasher-safe components; BPA-free. The tumbler fits most vehicle cup holders and is lightweight enough for daily carry.
Who it's for: Budget-conscious everyday users seeking solid insulation performance without premium pricing. A reliable mid-tier competitor to Yeti and Hydro Flask, with strong value-per-ounce. Iron Flask has earned trust in the outdoor-gear community for consistent quality and affordability.
02 / Signals
Why it's hot
Affordable 40oz tumbler with all-day ice retention and leak-proof flip lid.
- Value for money 94
- Review rating & velocity 86
- Community sentiment 84
- Brand reputation 82
- Search heat 82
- Est. return & defect rate 86
03 / Verdict
Pros & cons
Pros
- Holds ice 24+ hours
- Leak-proof flip-cap design
- Fits standard cup holders
- Great cost per ounce
- Lightweight and portable
- Includes reusable straw
Cons
- Flip cap can occasionally leak if inverted
- Straw requires regular cleaning to prevent mold
- Paint finish may chip with heavy use
- Limited color/style options vs. competitors
Capacity40 oz
InsulationDouble-wall vacuum-insulated stainless steel
Material18/8 stainless steel
Lid TypeFlip-cap with straw
Straw IncludedYes, reusable
Cold Retention24+ hours
Hot Retention12+ hours
Cup Holder FitStandard fit
Dishwasher SafeLid and straw safe; hand wash recommended for tumbler
Weight~1 lb (empty)
Bpa FreeYes
05 / Your take
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06 / Rivals
Compare with
07 / Variations
Other colors & sizes
Top pick
Iron Flask Co-Pilot 40oz Insulated Tumbler with Flip-Cap Lid
40 Oz · Dark Night
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IRON °FLASK Co-Pilot 32oz Insulated Tumbler with Dual Lids
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IRON °FLASK Co-Pilot 32oz Insulated Tumbler with Flip-Cap Lid
32 Oz · Rose Gold
#170 in Insulated Tumblers
IRON °FLASK Co-Pilot 40oz Insulated Tumbler with Dual Lids
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