I have been using flex disc for about 2 years now and it has been the best thing ever! Road trips, hikes, running, bed time fun, everything is super easy and comfortable to do using these! Never used a reusable cup due to my discomfort of the mess it'd Intel, but this is perfect with self emptying capabilities! Love the reusable disc and keep disposable available for emergencies and guests in my home! ABSOLUTELY LOVE THIS PRODUCT AND BRAND!