When filling your bottle, it’s important to allow space at the top, often referred to as the headspace. This is the gap between the product and the closure.
As a general guide, the optimal fill level allows at least 4% headspace.
• The capacity fill level guide is generally indicated on the product Specification Sheet, which you can request by contacting our team.
• You may need to allow more headspace, depending on the filled product.
Why you shouldn’t overfill:
- Prevents leaks: Overfilling can cause product to be pushed out when the cap, pump, or spray is applied.
- Ensures proper sealing: Closures need space to seat correctly. Too much product can interfere with the seal.
- Allows for expansion: Liquids can expand with temperature changes, which may lead to leaking or pressure build-up if there is no headspace.
- Supports functionality: Pumps and sprays rely on internal components that require space to operate effectively.
Note: If you’re using with a dropper, or a closure with a diptube you’ll need to account for the space taken by the dropper/tube when inserted into the bottle.
For the best indication of the appropriate fill level for your product and chosen bottle or jar, we recommend sample testing. Please contact our team to arrange a sample order.