Glass cup with outer sheath

The utility model provides a glass cup with an outer sheath, which comprises a glass cup body, the top of the glass cup body is in threaded connection with a cup cover, the periphery of the bottom of the cup cover is fixedly connected with a sealing gasket, and the bottom of the sealing gasket is in contact with the top of the glass cup body; by arranging the glass cup body, the cup cover, the sheath unit, the heat insulation layer and the heat preservation layer, the heat insulation layer and the heat preservation layer conduct heat preservation and heat insulation operation on the surface of the glass cup body respectively, and heat preservation on the surface of the glass cup body can assist the glass cup body in being used at the low environment temperature such as winter; the heat dissipation speed of the high-temperature liquid in the inner cavity of the glass body is reduced, then the situation that normal use of a user is affected due to the high heat dissipation speed when the high-temperature liquid