For storing opened food. At the 100-yen shop NATURAL KITCHEN, I found a goods called "bag clip".
Clips that help hold bags of sweets, flour, pet food, etc. Since it has a magnet, it can be stored in the refrigerator when not in use. I have introduced a clip called "pack clip " in my bag before, but if the bag is thick, this "bag clip" is easier and more convenient. Since it cannot be sealed, it seems better to avoid using it in foods that are stored for a long time.
The price is 108 yen for one model with a width of about 135 mm (tax included, the same applies below), and 108 yen for two models with a width of about 52 mm. The fluorescent color looks pretty cute, so why not add it to one of your kitchen items?