Yes, we do indeed sell replacement lids. These lids can be used with the cuvettes for the Colorimeter, SpectroVis, Vernier Spectrometer, and Ocean Optics spectrometers. The lids are made of polyethylene. They are sold as a pack of 100.
The lids are 12 mm square on top and gradually taper down to 9 mm square on the bottom side that fits down into the cuvette. The lids will fit most standard 1 cm pathlength spectrometer cuvettes with a square opening, but they will not fit into cuvettes with round openings.
Cuvette Lids (100 per pack) (CUV-LID)