Star San Acid Sanitizer. 8 oz size. No rinse when mixed properly.
Star San is my sanitizer of choice. It is effective, food safe and no-rinse. It is also very cost effective if you use the spray bottle method. See: Tip: Star San Tips, Tricks and Guidelines – Using Star San In a Spray Bottle
Why is this my favorite size of Star San? It all has to do with shelf life. See: My Favorite Size of Star San & Why
Star San – 8 oz – note that multiple variations of this product may be available, as such a different version may appear at this link