It seems to be useful not only for yogurt but also as a container for sweets. I found a cute "design yogurt bottle" in the 100-yen shop Can Do, so I bought it.
"Design yogurt bottle" is a small bottle with a polyethylene lid. The capacity is about 100 ml, and in the case of nuts and chocolate confectionery, it is a size that can fit about 1 bag (40 to 50 g). If you buy a few, it will be useful for stocking snacks for the workplace.
Since it is not compatible with ovens and microwave ovens, it cannot be used for making sweets such as pudding. Also, because it is not airtight, it is not suitable for long-term storage of food, but why not put snacks and miscellaneous goods on your desk or use it as a small gift? The price is, of course, 108 yen (tax included) per piece.