IRON °FLASK Co-Pilot 40 oz insulated travel mug — double-wall vacuum, two lids, slim cup-holder fit

IRON °FLASK 40 oz Co-Pilot is a double-walled, vacuum-insulated travel mug that keeps drinks cold for up to 20 hours and hot for up to 5 hours while offering two versatile lids for on-the-go use.

This oversized 40 oz travel mug is engineered for commuters, outdoor enthusiasts, and anyone who wants large-capacity temperature control without spills. Built from 18/8 stainless steel and finished with a non-slip base, the Co-Pilot combines durability with daily convenience. It balances a large liquid capacity with a slim profile that still fits most car cup holders, and arrives with two lid options so you can switch between sipping and straw use depending on the beverage and activity.

How will this mug keep drinks cold or hot during long days?

The Co-Pilot uses double-wall vacuum insulation to reduce heat transfer and lock in temperature. That construction slows warming for cold drinks and reduces heat loss for hot beverages, so you get more of the original taste and temperature hours later.

• Cold retention up to 20 hours using vacuum-sealed walls
• Hot retention up to 5 hours for coffee or tea
• 18/8 stainless steel interior preserves flavor without metallic aftertaste
• Wide mouth allows ice cubes to fit easily for extended cooling

Will it actually travel without spilling or rattling?

Yes—this mug is designed with travel-friendly features: a slip-resistant rubber base, a slim shape to fit most cup holders, and two lid options that provide splash protection or a leak-resistant seal. The combination reduces accidental spills and keeps movement noise down.

• Rubber bottom for anti-slip and noise dampening
• Slim, tapered body fits standard car cup holders
• Splash-proof straw lid for easy sipping on the move
• Flip leak-resistant lid for secure transport of hot drinks

How easy is it to keep clean and maintain?

The Co-Pilot’s wide opening and simple lid designs make cleaning straightforward. Hand-washing is quick and effective, and the stainless-steel interior resists stains and lingering odors common with cheaper materials.

• Wide mouth helps reach all interior surfaces for complete cleaning
• Removable lids designed for quick rinsing or hand washing
• BPA-free, non-toxic construction for safer drinking surfaces
• Durable finish resists dents and discoloration with normal use

What accessories and materials should I expect?

The package includes two different insulated lids so you can choose the most convenient drinking style moment-to-moment: a straw-friendly splash lid and a flip-top, leak-resistant lid for hot beverages. The body is made from food-grade 18/8 stainless steel for long-term use.

• Two lids: splash-proof straw lid and leak-proof flip lid
• 18/8 stainless steel construction—durable and food-safe
• Large 40 oz capacity for all-day hydration or multiple servings
• Textured rubber base to protect surfaces and prevent slips

Who is this for? The IRON °FLASK 40 oz Co-Pilot is aimed at people who need substantial beverage capacity without sacrificing portability—commuters, road trippers, outdoor workers, parents, and anyone who prefers fewer refills during long outings. If you want a rugged, easy-to-clean travel mug that adapts between straw sipping and secure hot-drink transport, this model delivers a practical balance of size, insulation, and spill prevention.