It's about as heavy as a Football (American)
In other words, the weight of a Football (American) is 1.006944444444 times 0.90 pounds.(a.k.a. "pigskin") (NFL standard)
Per National Football League official rules, an American football must weigh between 0.8750 pounds and 0.93750 pounds. Because of NFL regulations, ceremonial considerations, and backup requirements, each NFL Superbowl requires the manufacture of 144 balls exclusively for the event.
It's about as heavy as a Football (Soccer)
In other words, the weight of a Football (Soccer) is 1.10 times 0.90 pounds.(a.k.a. Soccer, a.k.a. Association Football) (FIFA Law 2 specification)
According to FIFA's Law of the Game number 2, a football must weigh between 0.90 pounds and 0.990 pounds. An artifact on display at the Smith Art Gallery in Museum in Stirling, Scotland is said to be the world's oldest football and is about one-third to one-half the size of a modern football.
It's about one-and-one-fifth times as heavy as a Can of Soup
In other words, the weight of a Can of Soup is 0.830 times 0.90 pounds.(for Campbell''s Condensed Tomato Soup, 317.9 ml)
A can of Campbell''s Tomato Soup weighs 0.770 pounds. Cans have been used to store soup and other foods since their invention in 1913, but a dedicated can opener was not developed until cans began to use thinner materials — prior to that time, cans were usually opened using various blunt instruments and tools.
It's about one-and-three-tenths times as heavy as a Human Heart
It's about two-thirds as heavy as a Basketball
In other words, 0.90 pounds is 0.654545454550 times the weight of a Basketball, and the weight of a Basketball is 1.52777777780 times that amount.(NBA official ball standards, Size 7)
A regulation NBA basketball, manufactured by Spalding, is known as a Size 7 ball and weighs 1.3750 pounds. These balls have 4,118 pebbles each with a diameter of 2.5 mm
It's about two times as heavy as a Hamster
In other words, the weight of a Hamster is 0.50 times 0.90 pounds.(for Syrian hamster, a.k.a. golden hamster, a.k.a. Mesocricetus auratus; adult)
An adult Syrian hamster has a typical weight of about 0.40 pounds. Known for transporting food in the pouches of their cheeks so that they can bury it later, some hamsters can store up to 60 pounds of food in their borrows.
It's about two-fifths as heavy as a liter of Water
In other words, 0.90 pounds is 0.40822170 times the weight of a liter of Water, and the weight of a liter of Water is 2.4496490 times that amount.(fresh; 4° C / 39.2° F; maximum density)
Contrary to popular belief, 1 liter (0.0.264172052358148 gal) of water at 4° C / 39.2° F (its point of maximum density) weighs 2.2046840 pounds rather than 1 kg exactly. The total volume of water on the planet Earth is about 13,590,000,000,000,000,000 (13.59 quntillion) L (3,590,000,000,000,000,000 gallons).