Someone shared this on RC. The Maple Syrup cuvettes are interchangeable with the checker. $1 each cuvette! http://hannainst.com/hi731359-round-glass-replacement-cuvettes-for-hi759-25-pcs.html Free shipping at $50, or two boxes. 50 cuvettes is a lot so we can split some between areas. I'm planning on getting a box or two, and I'm getting some Alk reagents as well. I'm in San Jose.