Disposability prevents cross-contamination risk.
No cleaning is required.
Cuvettes are highly chemically resistant. The plastic disposable cuvettes can be used with most polar organic solvents, as well as acids and bases.
The mold cavity number is used to group plastic cuvettes at production time; this helps to ensure the lowest cuvette-to-cuvette variation in extinction coefficient.
Recessed windows prevent scratching of the optical pathway.