How much does it cost to fill up a container ship with fuel?

Okay, here's the information you need to summarize. This is intentionally vague and broad, as the actual cost fluctuates wildly.

Information:

The cost of fueling a container ship is incredibly variable and depends on several factors: the size of the ship, the type of fuel used (Heavy Fuel Oil or Very Low Sulfur Fuel Oil being the most common), the current price of fuel per ton, and the location where the ship is refueling (as prices vary port to port). A very large container ship can hold thousands of tons of fuel. Given the volatility of the fuel market and the sheer volume required, filling a large container ship can easily cost millions of dollars. The transition to cleaner fuels, while beneficial for the environment, often increases the fueling costs significantly. Factors like geopolitical instability and global demand heavily influence these prices, leading to dramatic fluctuations throughout the year.