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What changes The standard Which inverts the usual cost argument The bilge is the second path So the closure is the containment And motion is constant Three leaves, three different risks The shelf got one thing right without being told And one thing badly wrong Read the sheen section before the containers section References

A spill on a boat is a discharge. That one fact reorders every packaging decision here.

What changes

In a workshop a dropped bottle is a mess and a cost. In a cockpit it is a discharge into navigable water, judged by a standard you can see with your eyes.

The standard

A discharge of oil in quantities that may be harmful includes one that "cause a film or sheen upon or discoloration of the surface of the water". A sheen takes very little oil.

Which inverts the usual cost argument

A larger container is normally cheaper per unit. On a boat it is also a larger worst case, and the worst case is a federal discharge rather than a wasted purchase.

The bilge is the second path

What spills in an engine space does not stay there. It goes to the bilge, and the bilge pump goes over the side, which turns a small spill into a pumped discharge.

So the closure is the containment

There is no secondary containment on a small boat, no bund, no absorbent floor. The closure and the locker are the whole system, which raises what a closure is worth here above any other property in this library.

And motion is constant

A container in a locker is shaken, inverted, heated and chilled, for days at a time. That is a sealing test no bench test replicates.

Three leaves, three different risks

Marine lubricant is an oil and the sheen standard names oil. A boat cleaner is an aqueous discharge with a different legal character. Hull wax is a paste that mostly ends up on the hull.

The shelf got one thing right without being told

There is no glass on it. 166 HDPE, 117 PET and 71 PP, and nothing breakable, which is the correct answer for a boat and is not something the archetype asked for.

And one thing badly wrong

The archetype exists for the trigger sprayer and the shelf has two trigger sprayers out of 526 closures. That is stated here rather than left for a buyer to find.

Read the sheen section before the containers section

The standard is what makes the container decision serious. Without it this is just a cleaning product in a bottle.

References

40 CFR 110.3, discharge of oil in such quantities as "may be harmful" under section 311(b)(4) of the Clean Water Act. Such discharges are those that "(a) Violate applicable water quality standards" or "(b) Cause a film or sheen upon or discoloration of the surface of the water or adjoining shorelines or cause a sludge or emulsion to be deposited beneath the surface of the water or upon adjoining shorelines". law.cornell.edu

The Davis Pack Supply catalog, measured 18 October 2026. The marine shelf is 880 rows: 354 containers and 526 closures. 50 mL to 3,785 mL with a median of 237; 101 containers over a pint, 45 over a quart, 13 over a gallon and none over five gallons. 166 HDPE, 117 PET, 71 PP, and no glass or metal at all. 163 jars, 159 bottles, 19 tubs and pails, 12 jugs, 1 tube. 136 white, 83 natural, 54 clear, 39 black, 20 amber. Closures: 368 continuous thread, 39 child resistant, 26 dome lids, 26 spouted, 18 flip top, 11 liners and sealing discs, 10 round tubs, 7 specialty, 7 buttress, 6 phenolic, 2 trigger sprayers.

Written from 40 CFR 110.3 and 33 CFR 155.450, and from the catalog as it stood on 18 October 2026. The Vessel General Permit, the Vessel Incidental Discharge Act and in-water hull cleaning rules are named and not summarized; state and local rules on boat washing and marina discharge vary by water body. Whether a specific product may be used in the water is a question about that product and that water.