- These watch glasses can be sterilized in an autoclave or a laboratory oven and can be reused later.
- Made of borosilicate and quartz glasses that offer high resistance to thermal stock.
- Made of glasses that provide chemical resistance, and withstand mechanical durability.
- Make sure that glass does not completely seal the beaker so gas exchanges can occur.
- When using to cover vessels, place watch glass with the concave side facing up to the glass nests into the vessel.