I am a high school student replicating the Faraday Effect. I'm using cuvettes to fill with liquids and air to test the polarization of light. I found cuvettes such as these: The problem is the cap. The cuvettes are to be inserted inside of a solenoid, so the only possible way for them to be properly situated is horizontally. However, light from a laser cannot pass through the cap. Is there an affordable solution to finding UV plastic cuvettes that can be placed horizontally? Thank You.