Your answer is in the question! A gallon container will hold a gallon of anything, including water, air, rocks, lava, peanuts, marbles...etc. Also, a gallon of water weighs about 8 pounds.
1 Gallon.
5 gallon
Half a gallon
2
not that much
about $95.000
If the bag is exactly a gallon (and no more) then it can hold a gallon of water but not a gallon of ice. This is because when water freezes it expands slightly.
it barley holds 6 pints
Exactly 30 US gallon.
A two inch pipe can hold 0.1632 gallons per foot. It takes slightly over 6 feet of two inch pipe to hold one gallon of water.
Depends on the tub, but usually about 40-50 gallons.
A 20 Gallon tank can hold up to 20 gallons of water.