Tratt is ‘funnel’. Tratt comes via Low German trachter from Medieval Latin trajectorium, created from the verb trajicere, ‘throw, move, carry from one place to another, over a river, a wall, a ford, a strait’, here ‘pour from one vessel to another’, from trans ‘over’ and iacere ‘throw’
Funnel comes also from Latin, fundibulum shortened from infundibulum from the verb infundere ‘pour in’. Fundere ‘pour, melt, cast’ comes from the Indoeuropean root *gheu- ‘tp pour’ from which also come German giessen and Swedish gjuta.
Festis has a problem; he licks too hard and loses his fur in some places, so he has to wear this and eat some special food for two weeks from now, poor cat!