what is the tub full of I would ask, then I would argue the logic of what is full. What is it we empty? Do empty the water if that is what is in it, or do we simply empty the three tools from the bath tub.
pulling the plug is logical but it sounds so dramatic, it sounds like its the end of it all. I would want to savor/embrace the moment, make it last as long as possible, so Id use all three. Thats my half empty, half full glass over there. Thinking 2 hard, huh!
a bathtub is curved and dips at the drain where the plug is installed (and ideally can be pulled to drain the tub) supposing that the plug is not an option the goal would be first to remove the largest amount of water per action of removal possible, for this i would use the bucket. As I begin to near the point where the curvature of the bucket is no longer optimal for the scooping of fluid, i would switch to the teacup which has a smaller diameter and can therefore function more effectively as a scoop, as the situation approaches the previous problem I would again switch to the teaspoon.
but ideally I would prefer either that the plug be working , the bathtub easy to tip or that I have a length of hose sufficient for creating a siphon.
do you suppose there is a way to do it with a capillary system?
oh I KNOW!!! ...two words... "Water Ladder"
wait...am I allowed to convert the water to Hydrogen and Oxygen?
I picked the Bucket, Tea Cup and Teaspoon which I could then use to have some fun play time with my 2 year old Granddaughter! In the process, I would forget about emptying the tub, thus upsetting my wife who would then pull the drain plug in frustration and finishing the job for me!
Seriously, this is exactly how it would go down if my wife didn't watch me! She'll back this claim up too!