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  2. Hydration pack - Wikipedia

    en.wikipedia.org/wiki/Hydration_pack

    Hydration backpack. A hydration pack or drink bag is a type of hydration system built as a backpack or waistpack containing a reservoir or "bladder" commonly made of rubber or flexible plastic. The reservoir contains a capped mouth for filling with liquid and a hose that allows the wearer to drink hands-free.

  3. Hand luggage - Wikipedia

    en.wikipedia.org/wiki/Hand_luggage

    1 quart-size clear plastic zip-top bag holding the liquid contents (approx. 950 ml) 1 bag per traveler shown openly in the security bin; the TSA guidelines explicitly accept the metricized portions of 100 ml / 1 liter as defined later in the European Union; the list of exceptions for liquids (baby milk, diabetes diet) is identical to EU guidelines.

  4. Backpack - Wikipedia

    en.wikipedia.org/wiki/Backpack

    A 30 L top and bottom-loading Deuter Trans Alpine hiking backpack A 12 L front-loading Canon 200EG photography backpack. A backpack—also called knapsack, schoolbag, rucksack, pack, booksack, bookbag, haversack, packsack, or backsack—is, in its simplest frameless form, a fabric sack carried on one's back and secured with two straps that go over the shoulders; but it can have an external or ...

  5. Comparison of the imperial and US customary measurement ...

    en.wikipedia.org/wiki/Comparison_of_the_imperial...

    In 1824, these units were replaced with a single system based on the imperial gallon. [a] Originally defined as the volume of 10 pounds (4.54 kg) of distilled water (under certain conditions), [b] then redefined by the Weights and Measures Act 1985 to be exactly 4.546 09 L (277.4 cu in), the imperial gallon is close in size to the old ale gallon.

  6. Gallon - Wikipedia

    en.wikipedia.org/wiki/Gallon

    The wine, fluid, or liquid gallon is the standard US gallon. The wine gallon, which some sources relate to the volume occupied by eight medieval merchant pounds of wine, was at one time defined as the volume of a cylinder 6 inches deep and 7 inches in diameter, i.e. 6 in × (⁠3 + 1 / 2 ⁠ in) 2 × π ≈ 230.90706 cubic inches

  7. United States customary units - Wikipedia

    en.wikipedia.org/wiki/United_States_customary_units

    The common 55-gallon size of drum for storing and transporting various products and wastes is sometimes confused with a barrel, though it is not a standard measure. In the U.S., single servings of beverages are usually measured in fluid ounces. Milk is usually sold in half-pints (8 fluid ounces), pints, quarts, half gallons, and gallons.