Any quart will fit in a flat rate box from USPS. These cost $8.95 to ship regardless of how much it weights. I recently shipped over 20 mounds of sailboat hardware to Washington State from NY for $8.95. Did the Same with a small 25 Pound anvil to California.The $8.95 boxes come in 2 sizes a 6x6 square and a 6X10 rectangle.There is also a slightly larger flat rate box that ships for $12.95.I'm not sure of the size on that one as I don't have any yet.

Tom
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Got Socony???

Tom