These spouts you speak of; got two in different colors as not to confuse
them(of course,  forgot I even had two immediately).  Did you know that
one of those big jugs of motor oil look and feel just like a coolant jug
that some of us in the north use too often during the winter,
replenishing  the vital  water boxer liquids.  Imagine reaction to
seeing oil pour into your overflow tank. Imagine seeing an inch layer of
oil on top of your coolant.  Imagine trying to syphon just the oil off
the top-- the sweet taste of ethylene glycol spoiled by the wretched
oil.

chris c
wisconsin
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Get a filler spout for an antifreeze jug with the
'twist to open' on/off valve built right in, for a
buck at any FLAPS. They fit right on the wide mouth
oil jugs. I also bought a couple extra ones recently
to replace the original leaky spigot type valves on my
solar shower bags.

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TJ Hannink