We use clean pint canning jars with screened lids for germination tests for beans, peas, corn, grains and some brassicas. We soak 50 or 100 seeds overnight then rinse and drain them every day for ten days, picking out the sprouted ones each day. With what you have left after ten days you calculate the germination rate (percentage). Moisture causing seeds to mold during the ten days using this method can be an issue. After rinsing and shaking out extra water (gently without smashing the seeds into each other), the jars should be set upside down in a drain rack for several minutes. We had good luck with some bean seeds that really wanted to mold fast by soaking a new batch of 50 seeds in vinegar for fifteen minutes, then rinsing so no more vinegar smell remains and sprouting them normally.