PepsiCo (PEP) - Get PepsiCo, Inc. Report shares have done well this year, up 9% in 2017 and more than 11% over the past 12 months. Investors are hoping that momentum will continue after the company reports earnings on Wednesday before the open.

PepsiCo is "best in show," TheStreet's Jim Cramer said from the floor of the New York Stock Exchange Tuesday. Pepsi is a holding in the Action Alerts PLUS portfolio

CEO Indra Nooyi continues to do an excellent job, he added, positioning PepsiCo to continuously be in a better position than its peers. It has good growth in its beverage division, while PepsiCo's snacks division continues to do well too, Cramer said. 

"I expect nothing but the best from PepsiCo and that's what they keep giving us," he reasoned. 

Analysts expect PepsiCo to earn 91 cents per share on $11.98 billion in revenue for the most recent quarter. 

However, one company that hasn't been best in class is Twitter (TWTR) - Get Twitter, Inc. Report . Cramer said he expects this to be a "very tough quarter" for the company and questioned how much growth Twitter could have. 

Twitter reports earnings before the open Tuesday. 

That's the big problem with Twitter. Without growth, nobody wants to own it. But with growth -- like what Snap (SNAP) - Get Snap, Inc. Class A Report showed -- comes Facebook (FB) - Get Facebook, Inc. Class A Report , and Facebook has already shown that it can successfully copy and integrate other companies' best features. 

FB is a holding in Jim Cramer'sAction Alerts PLUS Charitable Trust Portfolio. Want to be alerted before Cramer buys or sells FB? Learn more now.

So even if Twitter gains some traction, what would stop a company like Facebook from copying them? Cramer also said Twitter had a good thing going with its NFL deal, which it was outbid on this year to Amazon (AMZN) - Get, Inc. Report

Analysts expect Twitter to earn 1 cent per share on $511.91 million in revenue for the most recent quarter.

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Finally, Cramer touched on Boeing (BA) - Get Boeing Company Report , which reports earnings Tuesday before the open as well. 

Boeing "blew the doors off" last quarter, Cramer said, so it's hard to expect that it will do so again. But that doesn't mean he is bearish. Boeing is likely to report a good quarter, just be reasonable about expectations, he explained. 

Take a long-term view on orders and don't eliminate Iran as a customer despite some geopolitical tensions, Cramer added. Boeing will likely be good, but it will be tough to top how well it did last quarter, Cramer reiterated. 

Analysts expect Boeing to earn $1.93 per share on $21.34 billion in revenue for the most recent quarter.

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At the time of publication, Cramer's Action Alerts PLUS had a position in PEP and FB.