The tree roots have grown around the bottle. Tree, Red Mulberry.
"Red mulberry is used locally for fenceposts because the heartwood is relatively durable. Other uses of the wood include farm implements, cooperage, furniture, interior finish, and caskets."
(Martin, Alexander C., Herbert S. Zim, and Arnold L. Nelson. 1961. Mulberry family: Moraceae. In American wildlife and plants. p. 313-314. Dover Publications, New York.)
The tree in fall. Bottle is under the leaves, left side of trunk. Old phone photo.
Google mulberry wood for some images of the beautiful wood.
The tree today.