Cap

The finishing touch for your essential oil bottles.

These replacement caps are designed to fit European-style essential oil bottles with a GL18 (DIN 18) thread — the standard neck size used on most amber and cobalt glass essential oil bottles. Whether you're restocking, repurposing, or building out your blending toolkit, having a reliable supply of properly fitted caps keeps your formulas sealed and your workspace organized.

At $0.25 each, they're an affordable and practical addition to any aromatherapy studio or home blending kit.

Compatible With

• European-style amber and cobalt glass essential oil bottles
• GL18 / DIN 18 neck finish bottles
• Standard 5ml, 10ml, and 15ml essential oil bottle sizes

Features

• Secure, snug fit on GL18-threaded bottles
• Protects contents from air and light exposure
• Sold individually

Tip: Stock up — these are easy to lose and always useful to have on hand.