So there are around 15k drops per gallon. So a drop in a 3 gallon bucket would be 1/45,000th. That would make this approximately 45 drops in the bucket. I hope this data helps inform the discussion about the URL.
I think it would actually be 227 drops in a 3 gallon bucket. However it's important to consider that it would be a mere 19 drops in a 1 quart pail. (based on 75k drops per gallon)