When trying to get my film developing solutions to temperature, I put them in a dishpan of water of the correct temp. The problem is that the plastic bottles and graduates that I have my stop, fix and wash aid in don't transmit heat very well so it takes quite a while for the solutions to stabilize at the proper temp. I would love to find some stainless steel beakers to measure my solutions into just prior to use but they are very expensive. Now my question. I ran across some inexpensive spun aluminum cups in a discount store. If I just crimp a pouring lip into the edge they would be perfect and would transfer temperatures from the water bath in a flash. My worry is possible chemical reaction between the chems and the aluminum. I have an SS graduate for the Developer so I'm just concerned about the others, mainly the stop and fix.. Any thoughts or [cheap] alternatives?