Best Lab Corks of 2025

Eisco Labs 10PK Cork Stoppers, also known as Eisco Cork Stoppers, are premium quality cork stoppers designed for sealing bottles, flasks, and test tubes in scientific applications. With a size of #6, these stoppers are 24mm in length, have a base diameter of 13mm, and a top diameter of 19mm. They are ideal for bottles, flasks, and tubes with a mouth/opening measuring 14-18mm in diameter. Made of durable, natural bark material, these corks are reliable and will not crumble or break easily. They are not only designed for professional laboratories but also suitable for household use. You can use them for homebrewing, sealing opened wine or beer bottles, spice rack vials, creative projects, DIY corkboards and mats, fishing, and more. Eisco Labs 10PK Cork Stoppers are versatile, durable, and a must-have for scientific and household use.

The Karter Cork Stoppers Size 3 offer a reliable sealing solution for various laboratory needs. With a top diameter of 14.2mm, these stoppers fit securely in standard lab containers, preventing spills and contamination. The middle diameter of 12.5mm ensures a snug fit, allowing you to store liquids safely without worrying about leaks. Measuring 19mm in length, these stoppers are easy to handle and insert, making your tasks more efficient. Their consistent quality helps maintain the integrity of your samples, providing peace of mind during experiments.

The EISCO Cork Stoppers are a pack of ten high-quality corks, perfect for various uses. Each stopper measures 13mm long, with a base diameter of 7mm and a top diameter of 10mm, making them ideal for sealing bottles, flasks, and test tubes with openings of 8-9mm. Their versatility allows you to use them for homebrewing, preserving opened wine or beer, or even for creative projects like DIY corkboards. Made from durable natural bark, these stoppers are designed to last and won’t crumble easily, making them reliable for both household and laboratory settings.

The EISCO Cork Stoppers are a pack of ten high-quality corks, perfect for various uses. Each stopper is 31mm long, with a base diameter of 20mm and a top diameter of 25mm, making them ideal for sealing bottles and flasks with openings of 21-24mm. Their versatility extends to both scientific and household applications, whether you're homebrewing, preserving opened beverages, or working on DIY projects. Made from durable natural bark material, these stoppers are built to last, ensuring they won’t easily crumble or break, providing you with reliable performance for all your sealing needs.

The EISCO Cork Borer Set is a versatile tool that includes six different-sized borers and a sturdy ram rod. These borers help you create precise holes in materials like agar plates for microbiology experiments or rubber stoppers and corks for various applications. With diameters ranging from 4mm to 12mm, you can choose the right size for your needs. Made from durable nickel-plated brass with comfortable plastic handles, this set is designed for both laboratory use and home projects, making it a practical addition to your toolkit.

The Eisco Cork Stopper #7 is designed for various laboratory needs. With a bottom diameter of 15mm and a top diameter of 21mm, this cork provides a secure fit for your containers, preventing spills and contamination. At a length of 25mm, it’s versatile for different sizes of bottles and flasks. You can expect slight variations in size, ensuring that you have corks that closely match your requirements. Sold in packs of 10, this product offers convenience and value, making it a great choice for your lab or home experiments.

The EISCO Cork Stoppers are a pack of ten high-quality, tapered corks designed for various uses. Each stopper measures 22mm long, with a base diameter of 12mm and a top diameter of 17mm, making them perfect for sealing bottles and flasks with openings between 13-15mm. Their versatility allows you to use them for scientific experiments, homebrewing, or even for creative DIY projects. Made from durable natural bark material, these corks are built to last, ensuring they won’t crumble easily. Although designed for laboratories, they are also ideal for classroom or home use.

Eisco Labs 10PK Cork Stoppers, also known as Eisco Cork Stoppers, are premium quality cork stoppers designed for household and laboratory use. These cork stoppers come in a pack of ten and have a tapered shape, with a length of 29mm, a base diameter of 18mm, and a top diameter of 24mm. The size #9 stoppers are ideal for bottles, flasks, and tubes with a mouth/opening measuring 19-23mm in diameter. Made of durable, natural bark material, these corks are reliable and won't crumble or break easily. They are versatile and can be used for scientific applications such as sealing bottles, flasks, and test tubes, as well as for household use, including homebrewing, sealing opened wine or beer bottles, spice rack vials, creative projects, DIY corkboards and mats, and fishing. These cork stoppers are designed for professional laboratories but are also suitable for use in the classroom, home, or garage.

The EISCO Cork Stoppers are a pack of ten premium-quality corks designed to fit bottles, flasks, and tubes with openings between 22mm and 26mm. Each stopper measures 31mm long, providing a secure seal that is perfect for homebrewing or preserving opened wine and beer. Made from durable natural bark material, these corks won't crumble or break easily, ensuring they last through various uses. Whether you're working on creative projects or need reliable seals for scientific applications, these versatile stoppers are ideal for both home and laboratory settings.

The Eisco Cork Stopper #1 is a versatile lab accessory designed for sealing containers effectively. With a bottom diameter of 8mm and a top diameter of 11mm, it provides a snug fit for various openings. Measuring 16mm in length, this cork is perfect for smaller bottles and test tubes. You’ll appreciate that while the corks may vary slightly in size, they are generally consistent, ensuring reliability in your experiments. Each pack contains 10 stoppers, making it convenient for regular use in labs or home projects.