It's about one-and-one-tenth times as big as a Baseball (packed).
In other words, 1.5 cups is 1.0796207 times the size of a Baseball (packed), and the size of a Baseball (packed) is 0.92625123 times that amount.(64% packing density) (MLB rules)
Per Major League Baseball rules, a baseball must measure between about 0.85267697 cups and 0.92572545 cups. A major league pitcher can throw a fastball at up to 150 kph (91 mph).
It's about seven-tenths as big as a Blood Donation.
It's about three-fifths as big as a STARBUCKS Venti Coffee.
In other words, the size of a STARBUCKS Venti Coffee is 1.7 times 1.5 cups.A STARBUCKS Venti coffee drink measures 2.5 cups. The name of the size, Venti, is the Italian word for twenty.
It's about one-and-seven-tenths times as big as a Baseball.
In other words, 1.5 cups is 1.686907279 times the size of a Baseball, and the size of a Baseball is 0.5928008092 times that amount.(MLB rules)
Per Major League Baseball rules, a baseball must measure between about 0.8526769741 cups and 0.9257254538 cups. A major league pitcher can throw a baseball at up to 150 kph (91 mph) in a fastball pitch.
It's about two-and-a-half times as big as a Tennis Ball.
In other words, 1.5 cups is 2.253 times the size of a Tennis Ball, and the size of a Tennis Ball is 0.4439 times that amount.(ITF Standard; for Type 2 ball)
Per International Tennis Federation standard, regulation tennis balls must measure 6.54 cm to 6.86 cm in diameter, for a total volume of 0.6657 cups. Competition balls are also tested for bounce height, with the standards requiring that a ball dropped from 254 cm must bounce back to a height of 135 cm to 147 cm.
It's about three times as big as a Puck (Hockey).
It's about one-fifth as big as an Ostrich Egg.
In other words, 1.5 cups is 0.2175 times the size of an Ostrich Egg, and the size of an Ostrich Egg is 4.598 times that amount.(Struthio camelus) (for common ostrich; average)
The largest egg produced by living birds, ostrich eggs measure about 6.763 cups in volume. The eggs take about nine weeks to hatch, with males and females taking turns incubating them.