I wasn't a fan of the original Rumble Tuff Slim Cups due to suction loss and flimsy materials, but the company went back to the drawing board. This new version feels more rigid and durable, with better assembly instructions and improved anti-kinking features. I'll be testing these and reporting back with a full review, so stay tuned! If you've tried the Rumble Tuff Slim Cups, let me know your experience in the comments below.