The weakest part of the mug is the painting of the ceramic part, which has lighter discolouration on the top edge, the sides of the ear, and the areas where the ear approaches the connection to the body - and I specifically opted for this supposedly 'branded' model to avoid the flaws I have seen in reviews of very similar and slightly cheaper products available from anonymous sellers.
The advantages include the size, the comfortable ear and the very cool, large brewer, with lots of small holes, on one side allowing you to prepare a lot of herbs and on the other side, for example, ground coffee.
The durability of the wooden lacquered acacia wood lid, exposed to heat and moisture, may be a bit questionable, but due to its simple shape, it can easily be measured, modelled on the computer and 3D printed in some sensible material if necessary.