Universal thread fluid container enclosure systems

Various embodiments are generally directed to fluid container enclosure systems that couple with a fluid container and enable different systems, such as endoscopic systems, to access the contents of the fluid container, such as via a tubing set. The enclosure systems are configured to fit a wide range of fluid container necks, ports, or other openings, including various opening dimensions, thread finishes, and/or thread dimensions. In one embodiments, an enclosure system may include a cap having multiple carriages arranged therein. For example, a primary carriage may be arranged within the cap to engage with larger-dimensioned bottles. A secondary carriage may be arranged to float within the primary carriage to engage smaller-dimensioned bottles that bypass the primary carriage. Other embodiments are described.