Various microwave-proof containers can be used for "making" sterile water. This includes polypropylene and glass.
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Different sizes are shown here.
Distilled water is best but filtered Brita water can also be used. One milliliter of PPM is added to 1 liter of water.
Dispense into containers and microwave until the water boils. Continue microwaving for one more minute. Cool and then tighten covers. Store in plastic containers