Today, bagged rice (approx. 1 kg) Pack it in a box no thicker than 3 cm. The paper is G-dan, which is attractive for its thinness. The shape can be adjusted, so I'll give it a try for now. Click Post has a weight limit of "up to 1 kg". If you pack 1 kg of rice, the weight of the box will be exceeded. Click Post is supposed to reduce the weight of rice only by the weight of the packaging box. (1 kg = 6.7 cups)

First of all, I'll make it like a normal shipping box. Since it is a food product, the four corners should be sprung so that they will not be exposed. When you stand the box up, the rice will move around. The middle of the box will bulge out and be over 3 cm.

The part of the rice is losing its shape.

I'll try to make a fold so that the middle part will be within 3 cm. I'll try to make a fold.

I'm folding it inward to try it out. It holds the fold in place. It will hold it in place. I'm also going to try just folding the lid back in.

I can close it nicely but it rebounds when I put the gummed tape on it. I'll see if I can do something about it but for now it's dead. ↓↓↓ Using the first sample I tested the lid.

It stops even without tape. I'm not sure where the folded in flaps went but I'll see if I can't stretch the flaps out. I'll see if I can't stretch out the flaps to make it work. (I know what it looks like and I have a few ideas so I'll go ahead with miniatures.) ↓↓. Lengthen the left and right flaps. (I know how it looks and I had some ideas so I'll go ahead with the miniature.

Cover and hold from the bottom as well, making it look more dependable.

↓ It tucks in snugly. For shipping put a piece of tape on the top and fasten it around the back.

Finished.