Double Ratchet Shredder

This one is probably my favorite for the straight function focused.    Double Ratchet disks with 6 slits each and 8 cuts on the bottom perc really stack those bubbles with a super smooth pull.   Less of a bloop at the end of this one, I cut the slits wider for more flow. This one has a more "open" pull than the single ratchet piece.   

Has the nipple tip mouthpiece instead of the regular flat top on the others.