What is the proper problem name / algorithm for this problem description in computer science theory?

Question

The problem is that I have X items of varying weighted values that must go into Y containers. The containers are of differing sizes (e.g. hold differing maximum weights). The to

Answer 1

Sounds like multiple-knapsack to me. From Wikipedia:

If we have n items and m knapsacks with capacities Wi, we get the multiple knapsack problem

EDIT: Sorry, missed the bit about each container needing to be similarly loaded. Still, it smells like multiple-knapsack, albeit with an extra constraint.