The Comfort of Friends - S6-E4
Continuity mistake: When Michaela enters the homestead after handing Katie off to Matthew, it immediately cuts to her in the master bedroom upstairs, pouring water into the bowl to splash on her face, as she suffers another pregnancy attack when she wouldn't have been able to manage climbing the stairs in her delicate condition.
Answer: A Cooper was someone who made various things out of wood including wooden caskets and even barrels.