ummm, why would you eat in the bath that is pretty weird how every if it were me i would eat noodles with cheese on them macerooni'n'cheese. although it's pretty weird to even eat in the bathtub.
There is really no such thing as a "liquid" unit. The unit of measure is for the VOLUME of something. The best unit for measuring the volume of a human bathtub would be the "Litre".
The best thing to eat for a good diet will have to be fish. But not the seafood though
In the US, it is not illegal to eat oranges in the bathtub.
they are not tasty for everyone
Tex-Mex!
BRAINS......
If you are looking to purchase a walk-in bathtub, the best thing you can do is go look at your local home improvement store. Depending on the area, it may be Home Depot, Lowe's or a smaller business that can specialize in your need. As it depends on preference as well as need (i.e. for handicapped usage), it is best to go to the store.
My wife, she does a brilliant job.
Chocolate.
Chicken soup.
Some eggs and bacon