The image shows a set of five Erlenmeyer flasks, also known as conical flasks. These flasks are made of clear glass and have different volume capacities, as indicated by the markings on their sides: 1000 ml, 500 ml, 250 ml, 150 ml, and 50 ml. Erlenmeyer flasks are commonly used in chemistry and biology labs for mixing, heating, and storing liquids. They are designed with a narrow neck to prevent spills and a flat base for stability. The "Magnus Care Boro 3.3" marking on the flasks indicates the brand and the type of borosilicate glass used, which is known for its resistance to thermal shock and chemical corrosion.