Review on Non-Spill Replacement Caps: Magicfour Water Bottle Caps For 3 & 5 Gallon Water Jugs by Mike Shah

While they're advertised as being reusable, they don't actually come off easily enough to be reusable. Neither I nor either of my roommates could get them off without cutting them apart, and even if we could, the plastic feels so fragile compared to how tightly they're attached that I think pulling them off would tear them anyway. As single-use caps, they're both too expensive and too inconvenient.