How long does the 40oz insulated tumbler light sky blue keep drinks cold?

The 40oz insulated tumbler light sky blue features professional-grade insulation:

• Triple-Layer Vacuum: Eliminates heat transfer completely
• Copper Lining: Reflects radiant heat for enhanced performance
• Cold Retention: 24+ hours of ice-cold beverages
• Hot Retention: 12 hours of hot coffee or tea
• UAE Tested: Keeps ice frozen even in Dubai's extreme heat

In real-world testing, our 40oz insulated tumbler light sky blue kept ice frozen for 30+ hours in 40°C heat. That's the performance you deserve.