These are blemish agar plates. They are ugly but sterile. Defects may include bubbles, sediment, or two nutrient blends (as pictured). X10 pre poured sterile agar plates.
Comes with extra parafilm to reseal plates. Winter advice: please warm plates slowly as a rapid increase in temperature will cause an excessive amount of condensation.
The best method we have seen so far is to place the plates in a cooler outside and bring them in. This will provide a buffer that allows them to warm up at a slower rate. This item is made of agar and petri dish.