Buy a full case and the price per unit drops automaticallyRequest a sample
AccountCart0
All ContainersBottlesJarsCaps & ClosuresPumps & SprayersTubs & PailsJugsDroppersTinsTubesAccessories
Industries
Personal CareShop all 934 items →
AromatherapyBathBath →Body careBody care →Color cosmeticsColor cosmetics →DeodorantDeodorant →FragranceFragrance →GroomingHair careLip careLip care →NailNail →Oral careOral care →Skin and faceSkin and face →Soap and washSoapmaking →Sun and protectionSun and protection →
Learn:BathBody careColor cosmeticsDeodorantFragranceLip careNailOral careSkin and faceSoapmakingSun and protectionEverything we have written →
Learn
Beekeeping100Hot sauce making90Jam and preserves96Pickles and ferments64Sauces and condiments36Syrups36Oils and vinegars34Nut butters and spreads33Dairy and alternatives33Coffee and tea36Confection31Resin and casting27Supplement liquids23Laboratory17Dispensing13Photography and darkroom14Industrial chemical14Prepared and deli15Body care14Color cosmetics13Bath14Pet health15Toiletry decanting14Oral care14Capsules and tablets14Nail14Fragrance15Deodorant17Fossils16Janitorial16Baking and dry goods16Seed storage17Specimens16Paint and ink18Automotive fluids18Wax melts17Diffusers17Detailing15Sun and protection18Dish and hand16Soapmaking91Candle making93Beverages92Cleaning products92Lip care89Minerals and rocks93Powders91Skin and face91Spices and seasoning91Findings and components16
All 1,895 pages we have written →
Automotive fluids
All Containers›Shop by use case›Automotive fluids›Containers›Sizes, from a 250 mL additive to a gallonShop all fluids and additives →
Containers

Sizes, from a 250 mL additive to a gallon

By Dwight Davis, Founder

Updated

On this page8
The regulations here are almost entirely indifferent to size, which makes the size question a practical one.

The two thresholds that exist

177 mL, above which a brake fluid container needs the sealing requirements, and 19 L, above which the do-not-refill caution is not required. This shelf sits entirely between them, so both answers are fixed for everything on it.

The additive bottle

A few hundred milliliters, dosed per tank or per sump, bought as a single-use item. Flip tops and spouts matter here and the label space is tight for a product that may carry a specified signal word and two specified statements.

The one-liter service pack

The common brake fluid format: enough for a bleed, small enough to be bought fresh, and consistent with a product that says store it only in its original container.

The gallon jug

3,785 mL, which is coolant and washer fluid territory. Handling becomes the design problem: a handle, a stable base, and a closure that opens with one hand while the other holds the weight.

Weight is a real constraint at the top end

A gallon of glycol is heavy enough that a jug is tipped rather than lifted, which makes the pour geometry and the spout more important than at any smaller size. It also makes the carton and the pallet pattern a genuine cost.

Freshness argues against the big pack for brake fluid

The whole point of the inner seal is that the fluid has not taken up water. A part-used gallon defeats that, which is why the service pack exists and why the rule tells users to keep the container tightly closed.

Cost the pack, not the liter

Filling, labeling, sealing and the label test are close to flat per unit, so a small additive bottle carries far more packaging cost per liter. Decide what each format has to earn rather than reading one number across.

References

49 CFR 571.116, Federal Motor Vehicle Safety Standard No. 116, Motor vehicle brake fluids. S5.2.1 requires every container of 177 mL or more to have a resealable closure with an inner seal impervious to the fluid and a tamper-proof feature destroyed or substantially altered on first opening. law.cornell.edu
49 CFR 571.116 S5.2.2, on certification, marking and labeling: seven required items on the container or a permanently affixed label, never on a removable part such as a lid, including the DOT grade, the minimum wet boiling point in Fahrenheit, a packaged-lot serial number and four verbatim safety warnings. S5.2.2.4 moves the labeling to an outer carton where the container is not normally visible. law.cornell.edu
Written from federal regulation and from measured catalog data, not from a blending bench. We sell containers and closures; whether a particular closure satisfies a particular clause is a question about that closure and its supplier’s testing, and nothing here certifies a package as compliant. Anything on these pages is a starting point.