Yes, a RETF serves nicely for food packaging, especially in the retail space. Here's an example of a cheese product that is well presented in a RETF box at a fresh produce and grocery store. The nice thing about it is that you can also use them in a refrigerator without the need to re-package the cheese or the food product inside in a different container if you don't consume the entire portion. So it's great for reuse after opening within the same package as well as displaying neatly in a store (as the square shape allows it to stack nicely).
Typically, a RETF box is printed and manufactured within 5-7 days from the day you approve the proof. Depending on the quantity and the amount of finishing options you require for your RETF box it can potentially require more time to ship your order out. Once the order is placed a better estimate can be provided for the production time of your specific box.
We recommend no more than 2lbs per 100 square inches. For example, a 4x4x4 RETF box should carry no more than 1.28lbs if your paperboard is in the range of 18pt to 24pt thickness. For any product heavier than that, we recommend a more rigid paperboard such as corrugated.