Fuguang Stainless Steel Travel Vacuum Thermos Flask (grey) 12 ounce

I like the product but I couldn't read anything in the manual. It was all in a foreign language. But it's self-explanatory. I couldn't tell if the inside was ceramic or painted metal. It leaves a weird metallic taste in your mouth too. Its super tall so I say buy a long teaspoon for this cup if you're going to mix stuff in it like sugar.4 stars since I couldn't read the manual, the cup is super tall, and since it leaves a weird metallic taste.

Love the design,Did not keep coffee warmThe seller was fine...not their fault