I use these for blending seasonal oil as well as well as mixing zddp and blending orphan jugs with 1 or 2 qts. in them. I just put a piece of blue painters tape indicating the mixe ie 7W35 or whatever. I get them free at work and they hold 2.5 gallons. Much easier than the old gallon jugs that cant be easily seen through. The neighbors seem to like them!
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