Chris has an idea for a product and would like to pitch it to Apple. Leo says simply put — he can't. It's likely that he won't get anywhere with an unsolicited pitch for a product. The protocol is usually to refuse such things with a legal rejection letter. That's because patent trolls will sue a company for ideas and if they come out with a similar product a few months or a year after they'd pitch to them, they could sue them. Google is more open though. He could try raising money on Kickstarter for his idea.
Leo says that really, the easiest part is the idea. The next thing to do is create a prototype with a local designer to create it. Then, he'll have to find a manufacturer in China to make a production run. He'll then have to try and get a vendor. All that can be difficult and costly.