This uses the 2 original pins and a piece of filament as hinges, use a soldering iron or similar to fuse the outside of the filament piece with the upper component. Probably only works on this exact model of insulated bottle.
I also included the fusion file (its a mess, explore at your own risk)
as requested in thread: https://www.reddit.com/r/functionalprint/comments/1ejufwr/thermos_handle_was_broken_made_a_new_one/
The author marked this model as their own original creation.