The Micro-Nano-Fluidics meeting took place in Toulouse (France) in September 2021. This conference was organized by a french research group and covered mainly 6 topics: Nanofluidics, Chemical Engineering, Flow-waves interactions, Flow chemistry, Diagnostics and clinics, Organ-on-Chip. Audrey and Jesús attended the 2 days conference and presented their poster. Audrey’s poster was focused on the development of a microfluidic platform for sperm sorting, while Jesús’s poster described his work on microfluidic droplet generation for bacteria encapsulation and biofilm studies. This national conference was a great opportunity for both ESRs to meet other researchers in microfluidics and discuss about applications in Active Matter.