With the stock market reaching new highs seemingly every week, it is getting harder to find quality investment candidates. So it's even more important in an expensive market like this to focus on quality businesses that have durable competitive advantages.

In the video below, Fool contributor Demitrios Kalogeropoulos profiles three companies that he thinks fit that bill.

Yes, McDonald's (NYSE:MCD), Starbucks (NASDAQ:SBUX), and Costco (NASDAQ:COST) are all valued at close to record highs right now. However, each stock could still make for a great long-term investment from here. Demitrios gives viewers one reason to buy each company, and suggests that investors ease their way into building any position so that they lessen the risk of getting into the stock at a peak level.

Fool contributor Demitrios Kalogeropoulos owns shares of McDonald's and Costco Wholesale. The Motley Fool recommends Costco Wholesale, McDonald's, and Starbucks. The Motley Fool owns shares of Costco Wholesale, McDonald's, and Starbucks. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.