High borosilicate glass material, lighter, and high temperature resistant. Double-wall glass cup, heat insulated. Under the glass floor is a hydrophobic silicone membrane, which serves to equalise the pressure between the glass walls.
Double Wall Cups
One Set : 4 x 80ml Double Wall Cups GlassCapacity: 80ml/2.73oz Features: Double Wall, Portable, Transparent, Heat Insulated Height: 7cm/2.76", Perimeter: 6.5cm/2.56" (Approx.)