20 pcs non spill caps,reusable 55 mm 3 and 5 gallon water jugs anti-splash bottle caps hsiulmy <b>how to use</b><br> 1.just press it on hard<br> 2.best important step: a sound ¡°pop¡± is a key point to make sure spill free.<br> <br> <b>uses in different occasion </b><br> 1.if you put the caps on probe type dispenser, the caps would be stick with the probe instead of float around in the water.<br> 2.if you use it in the water bottle on the top rack or with water pump, you can take off the inner caps for reusable.<br> <br> <br> <b>package included</b><br> 20¡á3 & 5 gallon water jug cap<br>