It's about as big as a Human Stomach
It's about one-and-one-fourth times as big as an Ostrich Egg
In other words, 2 liters is 1.2250 times the size of an Ostrich Egg, and the size of an Ostrich Egg is 0.81630 times that amount.(Struthio camelus) (for common ostrich; average)
The largest egg produced by living birds, ostrich eggs measure about 1.6 L in volume. The eggs take about nine weeks to hatch, with males and females taking turns incubating them.
It's about two-fifths as big as The Blood in a Human Body
In other words, the size of The Blood in a Human Body is 3 times 2 liters.(for 70 kg body; average altitude; average)
The volume of blood in the average human body is about 5 L. Persons living at high altitude, however, may have up to an additional 2 L of blood to compensate for the lower oxygen level.
It's about two-fifths as big as a Bowling Ball
In other words, 2 liters is 0.37955388960 times the size of a Bowling Ball, and the size of a Bowling Ball is 2.63467198570 times that amount.(USBC specifications; tenpin)
According to United States Bowling Congress specifications, a tenpin bowling ball should measure at least 10.795 cm (4.25 in) in radius for a total volume of about 5.26934397150 liters. Because regulation balls measure the same diameter irrespective of their weight, ball density varies by size and balls weighing less than about 5 kg (11 lbs) will float in water.
It's about three-and-a-half times as big as a STARBUCKS Venti Coffee
In other words, the size of a STARBUCKS Venti Coffee is 0.290 times 2 liters.A STARBUCKS Venti coffee drink measures 0.590 liters. The name of the size, Venti, is the Italian word for twenty.
It's about three-tenths as big as a Basketball
In other words, 2 liters is 0.281522942830 times the size of a Basketball, and the size of a Basketball is 3.55210836440 times that amount.(NBA official ball standards, Size 7)
A NBA official ball, manufactured by Spalding, is a Size 7 ball and measures about 7.10421672870 liters. The surface of these balls have 4,118 pebbles with a diameter of 2.5 mm each.