Fixer tastes like ... ? Who the heck would know? No, stop bath probably would taste like vinegar, but please don't taste the chems. I'm one of the people who is constantly urging folks not to pay too much attention to alarmist exaggerations of the "horrors" of photochemistry, but I would say it's an incredibly bad idea to ingest any photo solution.
If you're going to transfer KRST into a new container, why not do it right and use a proper brown glass bottle? Used well, KRST can have a very long life, so perhaps this is not the best place to economize.