Review on DOUNGURI Bamboo Tea Tumbler Mug with Strainer Infuser - 18oz Stainless Steel Thermos for Loose Leaf 🍵 Tea/Coffee on-the-go, Vacuum Insulated Travel Bottle for Hot and Cold Beverages, Leak Proof Design - A Perfect Gift! by Erik Wesley

I really wanted to like this mug but I'm so disappointed I would give it zero stars if I could. The presentation and packaging are really good; you can tell they take the time to create beautiful packaging. Unfortunately it doesn't keep you warm. I made tea at 8am to take him to work and by 11am the tea was lukewarm. Mind you, I brewed loose tea with boiling water and immediately sealed it, but after 3 hours I was disappointed! I would not recommend this product. UPDATE After seeing my review, the support team contacted me immediately. They were very concerned that I received a defective item. They refunded my money and sent me a new glass. They sent a handwritten note and a very nice letter along with a new one hoping it would work as they adhere to their quality and quality control process. I was very impressed with this gesture and went back to change the star rating to five. Thank you Donguri!