Connect the reversed vacuum to a power source or connect the hose and the glass funnel to an air supply. For a large class, this demo can be done with the plastic funnel and vacuum. For a small class, ...

Glass bottles can make handy cooking oil dispensers ... A stainless steel cap with a suctioned base for the bottleneck will ...

Boiling tube A slightly larger glass test tube. Used to heat substances over a Bunsen burner. Thermometer A device that measures temperature. Funnel A tube that is wide at one end and narrow at ...