water jugs caps anti-splash replacement non-spill jug caps for 3 & 5 gallon 55mm water bottle ( pack of 20 ) qboyi <p><b>water bottle snap on cap: </b>fit for 2.166 in(55 mm) 3 or5-gallon water bottles;</p> <p><b>notice:</b>suitable for snap top bottles, not for use with screw top bottles.</p>