how to contain a object inside in a specific area and move all of the items inside that are all together?

Hi, I'am currently stuck at a game project for my uni. I am trying to put a specific (instantiated) object inside a bowl (see picture below) and i would be putting multiple objects inside that bowl. however when the object reach the bowl and had been placed there when i select the bowl every other object should follow. i'cant find a code that could help me. (using the parent and child is possible but it has to follow a pattern the code im trying to visualize is it would be random) Thankyou for your time and support in helping me!

[1]: /storage/temp/152583-help.png