KEY POINTS
  • UPS and FedEx could be bigger winners from Amazon's Prime Day, Cramer says.
  • "If it's really that great ... just play them," he says.

Delivery service companies UPS and FedEx could be bigger winners from Amazon's Prime Day, CNBC's Jim Cramer said Monday.

"If it's really that great ... just play them," Cramer said on "Squawk on the Street."