Stanley 1.4L Thermos Fails to Retain Heat After Just 2 Hours

I purchased a 1.4L Stanley thermos during the November sales on Amazon, expecting high performance. However, I was extremely disappointed when I used it by the sea. After just two hours, the tea remaining in the thermos was barely warm, losing its heat entirely by the time I returned home. This was shocking, as I trusted Stanley's reputation for quality.

I was embarrassed when I couldn't defend the product's performance to my spouse, whom I had assured of its reliability. I am deeply dissatisfied and request an immediate resolution, whether it's a replacement or a refund. This experience has significantly impacted my confidence in the brand, and I expect prompt action to address this issue.