Well I'll find out when it arrives, it should be non insulated but well see and I'll let you know when it comes in.

Our Backpacker stainless steel bottle is 32oz, non-insulated, and with no coating on the inside. However, if you boil liquids in it, the bottle is too hot to handle, but I guess you could concoct a way to hold it or harness it without being burned and pour the boiling liquid in to a vessel that you can drink out of. We are developing an all stainless steel vacuum sealed bottle that will handle boiling liquids and not burn the one holding it.

So I think they are in development of a vacuum container but do not have one yet.