An erlenmeyer flask corked with a liquid with bubbles inside. 

Potion With Bubbles

A science class blackboard with drawings such as an uterus, a science flask, a virus and a heart shape.

Blackboard With Science And Biology Drawings

A test tube or science beaker with a round base containing a bubbly liquid.

Two scientific flasks with overflowing bubbles, surrounded by steam and piles of bubbles.

A beaker, flask, or vase with a tube stem and a triangular or conical base.

A test tube with a round base containing bubbly liquid.

A triangular based beaker with a narrow rim and bubbles.

A round based beaker with a narrow rim and liquid.

An outlined or minimalistic drawing of a triangular science flask as blackboard content for science class.

A round-bottom flask corked with a liquid with bubbles inside.

A round scientific flask with overflowing bubbles.