Drawing and storing whole blood using a 3D printed bottle cap and a disinfected 500 mL drinking bottle—A proof-of-concept study.
https://onlinelibrary.wiley.com/doi/10.1111/trf.18200
"The BC2L system represents a feasible, low-cost alternative for whole blood collection in resource-limited or crisis settings. It demonstrated comparable safety and mechanical integrity to standard systems"