The general purpose of these designs are described in “Polyaniline Electrodeposition on Flexible ITO Substrates and the Effect of Curved Electrochemical Conditions”, which is published in the Journal of the Electrochemical Society (open access).
DOI: 10.1149/2.0871913jes
Journal of The Electrochemical Society, 166 (13) D1-D3 (2019)
This particular part is an electrochemical cell used with a flexible ITO electrode that can be held at this curvature using additional alligator clips at the top and double sided tape at the bottom.