It's about one-five-thousandth as big as a Bathtub
In other words, 683.60 drops is 0.0002 times the size of a Bathtub, and the size of a Bathtub is 4,800 times that amount.(a.k.a. bath, a.k.a. tub) (for Bootz Industries Aloha 5 ft. Left Hand Drain Soaking Tub)
The capacity of a typical bathtub is 3,200,000 drops. Historically, bathtubs have been made of various materials including marble, terracotta, silver, gold, and iron but the size and shape of the tubs has changed little in their 7,000 year history.
It's about one-twenty-thousandth as big as a Hot Tub
In other words, 683.60 drops is 0.0000475 times the size of a Hot Tub, and the size of a Hot Tub is 21,100 times that amount.(for Lifesmart Rock Solid Simplicity Plug and Play 4 Person Spa With 12 Jets) (a.k.a. Spa, a.k.a. Jacuzzi, a.k.a. Whirlpool) (Advertised Capacity)
An average, four-person hot tub holds 14,400,000 drops of water. Modern hot tubs became popular outside of Japan starting in about 1940.
It's about one-three-hundred-thousandth as big as a Concrete Mixer Truck
In other words, 683.60 drops is 0.0000031 times the size of a Concrete Mixer Truck, and the size of a Concrete Mixer Truck is 320,000 times that amount.(a.k.a. cement mixer, a.k.a. cement mixer truck, a.k.a. cement transport truck, a.k.a. concrete mixer, a.k.a. concrete transport truck, a.k.a. in-transit mixer)(standard size; drum capacity)
A concrete mixer truck has a drum volume of up to 220,000,000 drops. Concrete mixer trucks can be in transit for about 90 minutes before the concrete dries — if the concrete dries while in the drum, jackhammers or even dynamite must be used to remove it.
It's about 0.00000002 times as big as a Hot Air Balloon
In other words, 683.60 drops is 0.000000016 times the size of a Hot Air Balloon, and the size of a Hot Air Balloon is 63,000,000 times that amount.(four-person capacity; envelope volume; average)
The average volume of a hot air balloon sufficient to lift four adults is 44,000,000,000 drops. Typically made of nylon or dacron, a balloon envelope of this size typically weighs just 88 kg (190 lbs).
It's about 0.00000002 times as big as an Olympic Swimming Pool
In other words, 683.60 drops is 0.000000014 times the size of an Olympic Swimming Pool, and the size of an Olympic Swimming Pool is 71,000,000 times that amount.(FINA regulation; (minimum capacity)
According to the Fédération Internationale de Natation (FINA), a swimming pool for Olympic and world championship events must measure 50 m by 25 m with a depth of at least 2 m for a total volume of 50,000,000,000 drops. A pool of this size was to be used in Olympic time trials in New Jersey in early 2008, but its component pieces were stolen from a warehouse, likely to be sold for scrap metal.
It's about 0.000000006 times as big as The Goodyear Blimp
In other words, 683.60 drops is 0.00000000595 times the size of The Goodyear Blimp, and the size of The Goodyear Blimp is 168,000,000 times that amount.(for GZ-20A)
The Goodyear GZ-20 model Blimp measures 115,000,000,000 drops in total volume. A December, 1929 college football game between the University of Florida Gators and the University of Oregon Webfoots (later the University of Oregon Ducks) began with the blimp dropping a parachute-equipped ball from a height of 61 m (200 ft) to the field below.
It's about 0.000000002 times as big as The Lincoln Memorial Reflecting Pool
In other words, 683.60 drops is 0.00000000134 times the size of The Lincoln Memorial Reflecting Pool, and the size of The Lincoln Memorial Reflecting Pool is 746,000,000 times that amount.(Washington, D.C.)
The Lincoln Memorial Reflecting Pool holds approximately 510,000,000,000 drops of water. The Pool has a sloping bottom and extends to 80 cm (30 in) deep in its center.