Fun Facts › Weird Facts › It would take 17,000 McDonalds strawfuls of water to fill a standard b...← NextRandomPrevious → It would take 17,000 McDonalds strawfuls of water to fill a standard bathtub. By Rich Powell Posted: 13:38 29/03/2011 Topics: Straw, McDonalds, Water, Useless, Random, Bath A McDonalds' straw will hold 7.7 ml, or just over one-and-a-half teaspoons of whatever you are drinking. This means that it would take 17,000 strawfuls of water to fill up a 34 gallon bathtub.