Molecular biology labs are usually stocked with an assortment of glass flasks, beakers, and bottles. Scientists use them for preparing media and other sterile solutions, as well as for holding liquid bacterial cultures. Laboratory glassware is great because it holds up well on hot plates and in autoclaves, but glassware from your kitchen can work too, and for a fraction of the cost.
Glass food jars or canning jars hold up well in pressure cookers and microwaves—just be sure to remove metal lids and cover with plastic wrap before microwaving. Remember, however, that glass food jars are not safe for use on hot plates. Direct contact with a heat source may cause them to crack or shatter.
Empty baby food jars work well for collecting water samples. Some people even use them in place of Petri dishes. Wash the jars and lids well and sterilize them before use. Put the lids on loosely or cover the jar openings with aluminum foil, then sterilize them in your pressure cooker, oven, or autoclave (see the Sterilizing Solid Objects page).