Feel the joy it presents and provides. The Double-walled glastal Espresso Cup Made of borosilicate glass that are light and robust at the same time. Under the glass floor is a silicone sealing part which serves to equalize the pressure between the glass walls.The small hole at the bottom of the cup which is normal for the process. Specifications Material: Borosilicate glass, BPA free Capacity: About 4oz, 120ml (We recommend that you fill with 100ml of liquid for comfortable use.) Function: drinking hot drinks will not burn your fingers, drinking cold drinks will not leave condensation water mist on the desktop. Use and Maintenance 1.Suitable for freezer and microwaves (max. 2 min. / 600 watts) 2.Please avoid contact with sharp objects when using it. 3.It is recommended not to use water over 45? to clean the silicone sealing parts on the bottom of the cup. Multifunctional cup Espresso cup/coffee cup/tea cup/milk cocoa cup/latte macchiato cup,easy to hold Also suitable for caramel macchiato, frappuccino latte, coffee latte, fruit tea, iced tea, ice cream, sundae, milkshake, hot chocolate, milk, yogurt, Fruit juice, lemonade (etc.) Gift occasions Suitable for family and friends Christmas gifts, Easter gifts, Thanksgiving gifts, Valentine's Day gifts, Mother's Day gifts, Father's Day gifts, Children's Day gifts, Valentine's Day gifts (etc.) Friendly Tips There will be minor differences between each product because of mouthblown and hand-finish craftsmanship.