Tapered Demijohn & Bottle Cork, 40mm/ 33mm

This natural tapered cork bung (33 mm small end / 40 mm large end) provides a secure, airtight seal for demijohns, bottles and other tapered-neck containers, making it perfect for fermentation, storage and laboratory applications.

Crafted from premium, sustainably sourced cork, its tapered profile expands to fit a range of neck diameters, creating an impermeable barrier against air and contaminants. Cork’s natural elasticity, low moisture uptake and antimicrobial properties ensure contents remain pure and flavours uncompromised—essential for home brewing, winemaking and scientific use.

Key Features

• Tapered design: 33 mm to 40 mm profile adapts to various neck sizes for a reliable, snug fit.
• Premium cork material: Naturally elastic and impermeable, creating an airtight seal.
• Antimicrobial properties: Inhibits bacterial growth to protect and preserve contents.
• Sustainable & reusable: Eco-friendly cork harvested responsibly and suitable for repeated use.
• Versatile application: Perfect for home brewers, winemakers, bottlers and laboratory technicians.