Long Riddles and Answers

Question: I am very strong and tough but can be broken in some ways. What am I?

Question: What is red and white at home, but can never be that when it leaves?

Question: What starts with the letter "t", is filled with "t" and ends in "t"?

Question: I wear a red coat and have a stone in my throat.

What am I?

Question: what is small but can save things that do not weight anything in it?