This is a rather uniquely shaped decanter bottle with stopper, which I believe was made by the Pilgrim Glass Company. I see one just like it in the peachblow color in an ad shown in Leslie Pina's book, Popular '50s & '60s Glass Color Along the River, p. 62 (Item 430). This bottle is a brilliant red-orange color, which I believe was called Tangerine. 

The stopper is rectangular and is solid glass. The stopper is 3 3/8 inches long, and about 1 1/4 inch square at the top. There is some ground area on the part that fits into the bottle, and the inside end is also ground. The bottle is square, 6 3/8 inches tall without the stopper and 9 1/4 inches tall with the stopper in place. It is 3 3/8 inches wide in either direction, at the bottom. The inside of the neck is ground. Pilgrim hand-ground these decanters and their stoppers so that they fit together perfectly.

The decanter bottle has no chips, cracks, or scratches. The stopper has a tiny chip 1/8x1/8" in one corner, an intact flake/bruise in the next corner, and a minuscule chip/nick in the next corner. (These can be seen in my last two photos.) They are very shallow and the end of the stopper could be ground to remove them. There is a tiny bubble in the glass on one side of the bottle, plus several minuscule bubbles, and a tiny black inclusion on another side. It has a rough, sort of bubbly pontil scar. (I will add a photo of that as soon as possible.) The bottle with stopper weighs 2 pounds 6.1 ounces.

This will be shipped by my choice of either UPS Ground Saver or USPS Ground Advantage rate (except for International). Local delivery is always available for free to a mutually agreed upon meeting place.

I am happy to answer your questions about this piece.