What size plastic barrel should be used for 1kg of nuts? How to determine the appropriate capacity for food packaging barrels?

When many customers inquire about food packaging buckets, their first question is:
How large of a barrel is needed for my 1kg product? ”

It appears to be merely a straightforward capacity issue.
But we usually don't answer immediately:
"Use 2L."
Or:
Use 2.5L
Because there is a very easily overlooked issue here:
1kg ≠ 1L
The food packaging barrel is labeled with its capacity, such as 1.8L, 2L, or 2.5L.
The 500g, 1kg, and 2kg mentioned by the customer refer to weight.
Weight and volume cannot be directly equated.
Therefore, even for the same 1kg of food, the required packaging containers may be entirely different.

1. Why do containers of the same 1kg food have different sizes?

The main reason is:
The bulk density varies among different types of food.
Here's a very straightforward example.
Both are 1kg:
1kg of nuts
and
1kg pet freeze-dried food
The actual occupied space may differ significantly.
Coffee beans, dried prunes, candies, and tea leaves are the same.
Some products have relatively compact particles;
Some products have relatively large particles;
Some products have more gaps in the middle;
There are also some products that are inherently fluffy.
Therefore, it cannot be simply followed by:
1kg = 1L

Go select the food packaging barrel.

2. What size barrel should be used for that 1kg of nuts?
There is no fixed answer that applies to all nuts.
Because even though they are all called "nuts," the products themselves are different.
for example
Cashews, almonds, walnuts, pistachios, daily mixed nuts
The particle size and packing state are different.
Moreover, some customers opt for pure nut varieties;
Some may also include:
Raisins, cranberries, dried fruits, and freeze-dried fruits.
The final required space will naturally change accordingly.
So if you ask:
"Is 2L or 2.5L required for 1kg of nuts?"
The answer is:
It is recommended to determine based on the actual product's trial assembly.

3. Food packaging buckets are not best when they are "just filled to the brim."
This is also a common issue that often arises during the first procurement of packaging drums.
Some customers feel:
As long as 1kg fits perfectly, it means this specification is suitable. ”
Actually, not necessarily.
Assuming a barrel is filled with product after:
It has already hit the bucket lid directly;
There is almost no space left;
The product is prone to falling out when opened.
Although in terms of capacity:
Indeed, it "fits perfectly.".
However, from the perspective of actual user experience, it may not necessarily be the most suitable packaging.
Therefore, the key consideration when selecting specifications should be:
Capable of holding + With reasonable space left + Easy to access
rather than simply pursuing:
"Just the right size to fit inside."