RMS Titanic Reproduction 3rd class Cup & Soup Bowl

Purchased at the RMS Titanic tour which showcased items pulled from the wreck and facts from the disaster. I wasn't able to purchase a full 4 seat set at the time so I just bought the tea cup and soup bowl. The soup bowl has an outer rim for spillage since you couldn't lean over. The cup has a hairline crack...not sure how since I have never used them or messed with them. It was just on display in my parents China cabinet for storage. I put stress on the crack though and 8t didn't grow.