It's sized just right, at 1L its neither too small or too large. If it was bigger it might be too heavy, smaller and there wouldn't be enough Yerba Maté/coffee. 
 
Painted with a durable coat that gives it an elgant look and staying that way through its life. 
 
This thermos has no glass on the inside (which breaks when you drop it) but is fully stainless steel inside and out. Two screwable lids makes for a bigger hole when refilling.
No more drips with this fantastic, well designed pouring spout; developed to stop water immediately when tilting back after pouring. 
Thermos can also be used for other beverages like tea or coffee as it comes with a cap designed as a cup.