A Glass is not Always a Vaso

The word VASO in English is GLASS. We all know that, but there is a problem. Glass is Vaso if it is made of crystal (actually the name is Water Glass) . For us, Ecuadorians, the common perception of what a Vaso is goes beyond the material, so whether the material is porcelain, metal or other a Vaso is a Vasºo if it can be used to drink most liquids. We drink Coffee or Tea in Tazas which in English are called Coffee Cups or Tea Cups. If we are to drink Wine then we use Copas which in English are called Wine Glasses. A Mug is a Jarro but we use those indistinctly for drinking Coffee, Tea, Fruit Juice or Water. 

Now imagine calling a disposable cup, a glass. But we do that in Spanish so it is recommendable to make our students aware of this little difference and thus we will spare them the little embarrassment of being told by someone other than us of the distinction between one thing and another.