Clear Double wall Glass Coffee Cup Tea Milk Glass Mug Cups Heat Resistant Glassware - Set of (4, 250ml/9oz) Double-wall glass espresso shot mugs Made of high borosilicate glass of green environmental protection, crystal clear, simple sense is good. Design with double layers transparent heat resistant borosilicate glasses, perfect for coffee, tea, cappuccino, espresso or hot chocolate. Purely manual blow-molded heat resistant cup and there may be some difference between the cups Suitable for black tea, green tea, scented tea, coffee, milk, fruit juice, and other hot and cold drinks, recommended daily that occupy the home or office use.