IXOSquare Aligner Chewies for Invisalign Aligners - Orthodontic Chewies for Retainers, Invisalign Accessories, and Invisalign Munchies - 5 Pack - Mint Scent

I've a tried a few different chewies so far and this is one of the ones I like.The chewies I got from my doc are cylindrical and slippery so whenever I try to bite on them they just slide around making it difficult and more time consuming to seat my aligners. I'm not sure if it's the shape or the material these ones are made out of but they don't slip as much as the ones from my doc.I actually prefer the Y-shaped ones from this same company but if I had to choose another one it'd be these squarish ones.I'd buy these again and would recommend them to friends.