ESA astronaut Thomas Pesquet using MELFI to keep biological samples frozen on 05 June 2021.
Thomas shared this image on his social media channels with the caption: "Preparing for the departure of Cargo Dragon SpaceX CRS-22. Just before closing the hatch, we pack it full of our frozen bodily fluids: blood, urine, saliva... and more that I won't mention. Our bodies for science! The Dragon has working refrigerators on the home trip but we must be careful to not let the samples thaw out. Of course NASA thinks of everything and, we use these picnic cooler-like containers for transport. Our freezer cools to –80°C, so that is why we are wearing gloves!"
Follow Thomas and his Mission Alpha on his blog.