Best Flat Bottom Boiling Lab Flasks of 2026

The StonyLab Boiling Flask is a versatile laboratory tool designed for various heating applications. Made from durable borosilicate glass, it can withstand temperatures up to 200°C, ensuring safety during high-heat experiments. The flat bottom design provides stability on lab surfaces, minimising the risk of spills. Additionally, the long neck allows for easy handling and pouring, making it convenient for transferring liquids without mess. This flask's 250ml capacity is ideal for small-scale experiments, giving you just the right amount for precise measurements.

The Labasics Boiling Flask is a premium quality laboratory flask designed for efficient boiling operations. With a generous 500 ml capacity, it allows you to conduct experiments with ample liquid. The flask features a 24/29 standard ground joint, ensuring compatibility with various laboratory equipment. Made from durable borosilicate glass, its heavy-duty design withstands high temperatures, up to 250°C, making it ideal for rigorous laboratory use. The thick walls enhance its durability, providing you with a reliable tool for your scientific endeavours.

The StonyLab 2-Neck Flask is an essential tool for your chemical experiments. Its versatile functionality allows you to easily add reactants and measure temperatures during various reactions, enhancing your workflow. With multiple capacities available, you can choose the right size for your specific needs. The superior craftsmanship ensures a smooth surface and high transparency, which is critical for precise measurements. Additionally, the robust borosilicate glass construction offers excellent resistance to acids and alkalis, making it a durable choice for ongoing research.

The Eisco Florence Boiling Flask is constructed from heavy-duty borosilicate glass, ensuring durability and resistance to thermal shock. With a capacity of 50ml, it is ideal for small-scale experiments, allowing you to measure and mix precise amounts of liquids. The long neck design facilitates easy pouring and prevents spillage, making your experiments cleaner and more efficient. Although a stopper is not included, the flask's beaded rim allows for a secure fit with various stoppers, enhancing versatility in your laboratory tasks.

The Karter Scientific 250D4 Flask is a 2000ml boiling flask designed with a flat bottom, making it stable on lab surfaces and ideal for heating liquids evenly. Its height of 248mm offers a good volume-to-shape ratio, helping you handle larger quantities with ease. Made from durable 3.3 borosilicate glass, it resists thermal shock, so you can heat or cool substances safely. The long neck design allows for easier pouring and reduces the risk of spills, providing added convenience during your experiments.