I use this one. It’s a 16oz size and is shown in the photo. The Lantus pen makes it a tight fit though in terms of height. If purchasing this thermos with insulin cooling/transport in mind I’d get the 20oz version. The packs can’t be bent when first removed from the freezer. 18 hours later they are still cold but bendable.
A link to the 20ozer:
My setup:
