Worlds Trophy (2018)

I was wondering, whether the Trophy @stage is the actual Trophy, cause it looked like its a little too lightweight. Or is the Trophy Just some plastic crap? Like, I read that the first Trophy(at least the Trophy of 2014) or so was around 70pounds heavy and it didnt look Like its this heavy this year. So either they changed the mats used for crafting it (If so, please Tell me what its Made of) or we Just Get to See a weak Remake of the actual one. And does anyone know If the Teams Get to keep the Trophy or do they Return it @worlds next year? Thanks for the Help.