My family is not frum, but they do not eat non-kosher meat at home, although they do eat other not-certified-kosher products, including cheese. They don't mix meat and milk, but they do wash meat and ...
Let's say you're staying at a non-Jewish relative's house. He bought you kosher food because he knows you keep kosher. He buys you a drink such as milk. You see him pour the drink for himself into his ...