Do you know the 400 yen "picnic bag" sold at Daiso? It has been developed for a long time, but I liked the new spring design, so when I bought it, it was quite easy to use, so I will introduce it.
The main material of polyester is a firm fabric that can stand on its own even with a bag alone. The top lid is securely closed with a zipper. The size is 39 x 23 x 13 cm. This slim size with a slightly narrow depth is perfect for carrying a small number of picnic goods in a stable manner.
On SNS, some people use this bag to store diapers by taking advantage of the feature that the lid closes tightly. It's convenient because you can put goods such as wipes and garbage bags together and load the whole bag in the car.
In addition, there are various uses such as putting laundry goods such as hangers and clothespins and setting them by the window, and collecting items to be used together such as notebooks and stationery. It seems to be more active than the price, so please check it out!