5 ml = 1.01 tsp/90 gal
600,000 US gallons of water is 460,800,000 (460.8 million) teaspoons.
That depends on what the food or beverage is. Please put that information in your question.
Approx 0.033 gallons for 50 US teaspoons.
3,072 teaspoons is four gallons.
51 US gallons is 39,168 teaspoons
1,248 US teaspoons = 1.625 US gallons.
500 US teaspoons = ~0.65 US gallons.
500,000,000 US gallons = 384,000,000,000 US teaspoons.
36 US gallons = 27,648 US teaspoons.
11,000 US teaspoons = ~14.3 US gallons.
That is 2,112 teaspoons.
That is approximately 1,920 teaspoons.