Review on 🥤 GOOFIT 27Oz Black Stainless Steel Vacuum Sealed Insulated Thermos - Perfect for Outdoor Sports and Activities! by Dana Bullock

From the reviews I wasn't sure if this would keep my water hot for the tea so I did a little test as soon as I got it. I boiled water in a kettle. As soon as my kettle whistled, I turned it off and immediately filled the thermos with HOT water. Then I checked every hour how hot the water was. I put hot water in the thermos at 12pm and the last time I checked it was 9pm. When I opened the lid it was still hot, I poured some into the mug and dipped my finger in. Hot to the touch, good enough for tea! I think the negative reviews saying their liquid didn't stay hot was because they didn't pour enough hot water in. I am completely satisfied with my purchase. In fact, my son also tested the COLD by putting ice and water in it and he was pleased with how long it stayed cold. So I buy him his own :)