What are image formats that can store multiple image in a single file?
(I don't mean image formats such as GIF or APNG, which can store multiple images as animation frames. I mean file formats that support multiple images per file natively.)
I know TIFF and HEIF can do it. (HEIF is lossy, unfortunately.) Are there other ones, preferably lossless and, importantly, not too obscure to use for a general-purpose user?