Would you consider plastics that are BPA free?
Here's a stainless steel vacuum sealed one:
Amazon.com: Thermos Sipp 16-Ounce Vacuum-Insulated Travel Tumbler: Kitchen & Dining
I bought this one for my mother and she uses it constantly. The body is porcelain and the lid is silicone:
Amazon.com: DCI I Am Not a Paper Cup 10-Ounce Porcelain Travel Cup with Lid: Kitchen & Dining