The watch glasses are domed or cupped depending which side you have up.

Young4usYoung4us Watch Glass Beaker Cover Set, 6 Pcs Lab Watch Glasses in 150mm, 100mm, 70mm for Laboratory, Science and Chemical Experiment (150 mm x 2, 100 mm x 2, 70 mm x 2)

Young4usYoung4us Watch Glass Beaker Cover Set, 6 Pcs Lab Watch Glasses in 150mm, 100mm, 70mm for Laboratory, Science and Chemical Experiment (150 mm x 2, 100 mm x 2, 70 mm x 2)

Q: Can it withstand high temperature? Will it burst after too high temperature?

It's very heat-resistant. I can do experiments with fire in the laboratory without any problem.

Q: Is it okay to use corrosive liquids? Will they be corroded?

It won't be corroded. I used the corrosive liquid in the experiment. There was no problem at all, but remember to clean it up after using it.

Q: Can it be used as a lid?

I would classify them as a loose cover rather as a lid.

4.3/5

Product ID: 151101617

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12 interest-free installments with tabby

🌱Lead-free glass

📏3 sizes (150mm, 100mm, 70mm)

🧪Multi-functional use

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Description

🔬 Elevate Your Experiments with Style!

VERSATILE SIZING - Includes 150mm, 100mm, and 70mm options for all your lab needs.
STERILE ASSURANCE - Individually packaged to maintain cleanliness and experiment integrity.
MULTI PURPOSE MARVEL - Perfect for vaporizing liquids or as lids for chemical containers.
ECO FRIENDLY EXCELLENCE - Crafted from lead-free glass, ensuring safety and sustainability.
REUSABLE EASY TO CLEAN - Designed for repeated use, making your lab work efficient and eco-conscious.

This Watch Glass Beaker Cover Set includes six lead-free glass watch glasses in three versatile sizes (150mm, 100mm, and 70mm). Ideal for laboratory use, they serve multiple functions, from vaporizing liquids to covering chemical containers, all while ensuring sterile conditions for accurate results.