Best Lab Watch Glasses of 2025

QWORK Glass Beaker Cover is a set of 12 durable glass covers, each 2.4" in diameter and 1.4mm thick. These covers are versatile for evaporation, sample holding, and beaker/flask covering. The ground edges and polished surfaces ensure safe handling. Ideal for scientific experiments and teaching, these covers offer long-term service and resistance to shattering, providing convenience and safety for your lab needs.

Eisco Labs 12PK Watch Glasses, also known as watch glasses, are made with sturdy glass and feature ground edges and polished surfaces for safe handling. With a thickness of 2.0mm, these watch glasses are resistant to shattering. The set includes twelve covers, each measuring 3" (7.5cm) in diameter, providing a variety of uses in the laboratory. They are ideal for covering beakers and flasks, holding small samples for observation under a low-powered microscope, or evaporating liquids off of samples. The sturdy construction makes these watch glasses a great choice for science classrooms. Manufactured by Eisco Labs, these watch glasses are designed with quality and durability in mind.

The Karter Scientific 213H11 Watch Glass Beaker Cover is a 100mm diameter plain watch glass/beaker cover that fits Griffin Beaker sizes 250-500ml. Made of high quality inert flint glass, this heavy duty, reusable cover is great for use in dark rooms, fermenting, and more. Customers have noted that the glass is slightly smaller than advertised, and that it can be fragile and of low-end quality.

The stonylab Watch Glasses are essential tools for any laboratory or educational setting. These flat, circular glass discs are perfect for holding or mixing small amounts of liquids and powders. They are particularly useful when you need to evaporate solvents or heat small samples, offering a convenient surface for various experiments. Made from high-quality borosilicate glass, these glasses feature a smooth surface and excellent transparency, making it easy to observe your materials. Remember, these glasses should not be heated directly, ensuring their durability and longevity for your scientific needs.

The PATIKIL Glass Set includes four transparent glass watch covers in diameters of 60mm, 90mm, 120mm, and 150mm, each with a 2mm thickness. These watch glasses are made of durable table glass, offering corrosion resistance. They are ideal for various laboratory applications such as drop culture tests, beaker covers, and temporary storage of samples. By increasing liquid surface area, they help accelerate evaporation processes. Remember to wash and dry the watch glasses before and after use to ensure accurate experimental results and easy maintenance.

The EISCO Watch Glasses come in a convenient 12-pack, each measuring 3.5 inches in diameter. Made from durable glass, these covers feature polished surfaces and ground edges, ensuring safe handling and resistance to shattering. You can use them to cover beakers and flasks, making your laboratory experiments safer and more efficient. Additionally, they can hold small samples for observation or help with evaporating liquids, like when you're growing seed crystals. This versatility makes them a fantastic choice for science classrooms and home experiments alike.

The PATIKIL 50mm-150mm Watch Glass is a great choice for laboratory and home use. It is made of table glass with high chemical durability, corrosion resistance, and can effectively keep the material pure. It is mainly used for suspension drop culture tests, beaker covers, temporary storage of liquid and solid samples, corrosive substances weighing, paint mixing, etc. It should not be heated directly with fire to prevent rupture or be used as an evaporation dish.

Young4us Watch Glass Beaker Cover Set is a great choice for laboratory, science, and chemical experiments. It includes 6 pieces of lab watch glasses in 150mm, 100mm, and 70mm, made of lead-free glass that is non-toxic, reusable, and easy to clean. Customers have found it to be a great choice for vaporizing liquid, as a lid for other chemical containers, and for giving a gentle curve to polymer clay pieces. However, some customers have noted that the packaging is inadequate and the glass is fragile, so extra care should be taken when using them.

This lab watch glass by United Scientific Supplies has a concave shape with fire-polished edges. It is designed to cover boiling solutions and measures 50mm in diameter. The package dimensions are 11.2 H x 4.4 L x 8.5 W (centimeters).

EISCO Watch Glass, 5cm - Model CH0554A is a set of twelve 2" (5cm) diameter concave beaker covers made with quality glass. The 2.0mm thick construction resists shattering and is great for science classrooms. It can be used for a variety of laboratory functions, such as covering beakers and flasks, holding small samples for observation under a low powered microscope, or evaporating liquids off of samples. It is manufactured by EISCO Labs with quality and durability in mind.