Thermally insulating device for a beverage-containing bottle

An adjustable container for maintaining a long-necked beverage containing bottle at a low temperature comprising:

• (a) an upper member elongated about a center axis of symmetry and comprised of an outer shell of circular cross section in planes perpendicular to said axis and having interior and exterior surfaces, a layer of thermally insulative material of uniform thickness disposed upon said interior surface, an open upper extremity provided with an inwardly disposed resilient gasket of annular contour, and an open lower extremity of larger diameter than said upper extremity and provided with spiral threading, and
• (b) a base member of cup-shaped structure comprised of an outer shell of circular cylindrical configuration having interior and exterior surfaces and having a lower extremity and an open upper extremity, a flat panel serving to close said lower extremity and having interior and exterior surfaces, a layer of thermally insulative material of uniform thickness disposed upon said interior surfaces, and spiral threading disposed upon said outer shell adjacent its upper extremity and adapted to engage the complementary threading of said upper member whereby,
• (c) when said base member threadably engages said upper member about an intervening long-necked bottle, rotation of one member with respect to the other causes both members to be drawn into closer engagement, causing said gasket to firmly grip the bottle and thereby form a stagnant air envelope between the bottle and the thermally insulative material.