Megtaláltam, nekem is rémlett, hogy olvastam valahol, a Schwarzweisskeramik írt errôl:
Caution: Never fill boiling water into the cold scuttle! ...és ez a fontos!
Normal stoneware ceramics can withstand temperature shocks, but when the object is assembled (as is the case with scuttles) a sudden high temperature rise can lead to cracks where the elements are joined.
Hot water from the tap (up to 70°C/160°F) is usually hot enough.