I finally tried the RF I got from OSDIYS & am really disappointed. I mixed 8ml samples @ 15% & can barely taste anything at all. They smell great, but there just is not much flavor. The bread pudding is really the only one I can taste much at all, & I think it's the cinnamon that is letting me taste anything. I'm going to finish my samples & try again with maybe 18% flavor. As it is, I wouldn't use these to even try to mix together or with a recipe. I really can't see 15% for a flavoring or mix.
It got really tight and the rubber plunger stuck. I got it moving and flushed it with water and it seems okay.