nano- + container, introduced by the startup Theranos.
nanotainer (plural nanotainers)
- A small container used to hold a blood sample.
2015 October 16, Andrew Pollack, “Theranos, a Blood Test Start-Up, Faces F.D.A. Scrutiny”, in New York Times:
It has already received one approval, on a test for herpes simplex virus type 1, and will continue to use the nanotainer for that test.