I like this, because in English (UK), a mug is slang for an idiot...:-)
Things overheard in sports direct
In hungarian, mugs are not "strong", but "durable", "massive" of "thick". The mug's handle can be "strong".
This mug has a strong handle - Ennek a bögrének erős füle van.
Fül means "ear".
Do you mean: in English?