Question 229252
A Kiloliter is 1000 liters, because Kilo means 1000, like a Kilometer is 1000 meters.
Your question is slightly unclear, but I will assume by objects you mean what literally is the size of 1000 liters.

to give you a good estimate, picture a soda bottle. 2 liters. Now think of 500 soda bottles. Anything that size should hold a Kiloliter.