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 (MCD -0.42%), Starbucks (SBUX -1.02%), and Costco (COST -0.12%) 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.