U.S. patent application 20170290741 (applicant Tokitae LLC, Bellevue, Wash):
"Disclosed embodiments include portable devices for cold chain storage and methods of fabricating portable devices for cold chain storage. In an illustrative embodiment, a portable device for cold chain storage includes a container defining therein a storage region. The container includes an inner cylinder, and the storage region is defined coaxially inwardly of the inner cylinder. The inner cylinder includes phase change material disposed therein, and the phase change material is in thermal communication with the storage region. The inner cylinder also includes evaporative coils disposed therein. The evaporative coils are embedded in the phase change material. The container also includes a thermally insulated outer cylinder. An outer wall of the outer cylinder is disposed radially outwardly of an outer wall of the inner cylinder."