Are you looking to cut your stove and still have a hot beverage? I had a Hydroflask years ago but gave it away several years back. No good answer but I’ve used titanium bottles of various size that came with neoprene sleeves. I haven’t tested how long a hot beverage remains hot but keeping water from becoming too cold or too hot has been the issue here. It might stay fairly warm for a couple hours if it is also protected in a pack. I wouldn’t expect piping hot for any extended time.

The double wall bottles all come with a weight penalty. Your lightweight option might be a titanium bottle with neoprene sleeve or with some extra insulation like wrapped in a fleece. It’s cold out, you stop for a break, put on fleece and drink a hot beverage. Sounds pretty good and fast.