Longfill
Explore longfills: flavor concentrate measured into a larger bottle with room for the specified base liquid. This format is intended for DIY e-liquid mixing. Check each product’s concentrate amount, target bottle size and instructions before adding anything.
Showing 1–50 of 123 results
Showing 1–50 of 123 results
What is a longfill?
A longfill is a bottle containing a measured amount of concentrated flavor and empty space for compatible base liquid. Unlike an individual flavor concentrate, the bottle format and intended final volume are set by the product. Longfills on this page are made for DIY e-liquid preparation; they are not ready to use undiluted.
How to choose the right format
Longfills come in different combinations of concentrate and bottle size. Check the individual listing for the amount supplied and the intended final volume. Follow the brand’s instructions for what and how much to add; there is no single mixing ratio that applies to every longfill.
What is the difference between a longfill and a one shot?
Both contain a premixed flavor profile. A longfill comes in a larger bottle with space for the remaining ingredients. A one shot is a premixed concentrate that you measure into your own mixing bottle. To build a recipe from separate flavor notes, browse individual concentrates.
Base liquid and measuring
Use a compatible PG/VG base liquid according to the product directions. Measuring tools can help when preparing a precise batch. Shake and allow the mixture to rest if recommended by its manufacturer. Keep the final product and its ingredients out of reach of children.
Are longfills suitable for food or drinks?
Do not infer culinary suitability from a flavor name. Longfills in this category are presented for their stated DIY e-liquid format. Any other use would require explicit product-specific manufacturer guidance and ingredient checks.
Frequently asked questions
Does a longfill contain nicotine?
Check the individual product information. The products in this category are listed as nicotine-free concentrates, and the final mixture depends on what is added.
Can I use a longfill straight from the bottle?
No. The concentrate must be diluted according to its product instructions.
How much base liquid should I add?
Follow the specific longfill’s bottle size, concentrate amount and mixing guidance. These vary by brand and format.