Watch glass

A watch glass is a piece of laboratory glassware used for temporary storage of solids and sometimes liquids (in small amounts).

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Laboratory equipment
Equipment	Agar plate • Aspirator • Bunsen burner • Calorimeter • Colorimeter • Centrifuge • Condenser • Fume hood • Microscope • Microtiter plate • Plate reader • Rotary evaporator • Spectrophotometer • Thermometer • Vortex mixer • Static mixer
Flasks	Erlenmeyer flask • Florence flask • Volumetric flask • Büchner flask
Other Glassware	Beaker • Boiling tube • Büchner funnel • Burette • Conical measure • Crucible • Cuvette • Gas syringe • Graduated cylinder • Pipette • Petri dish • Separating funnel • Soxhlet extractor • Test tube • Thistle tube • Watch glass