When the first use,the top caps is a little tight,but do not influence the use of cap. Package includes: 5 X Caps<br> <br> How to use?<br> <br> 1.Just press it on hard<br> <br><br> 2.Best important step: a sound “POP” is a key point to make sure spill free.<br> <br> You can ued it at your 5 gellon water bottles,and this product will help you better use your bucket water.<br> When you start use this Non-Spill Caps,you will find that put the water to your water dispenser is no a hard work any more <br> and you will never worry about the water will spill into your carpet.<br> <br> We has been developed this kind of products for several years. and its price is feasible. Our WINBOB seller is willing to serve every of our customer, and thanks your support.<br> Remeber to use it correctly. They are tight at first but will loosen up with use. Maybe you will feel the caps is hard to remove, but it is still work great for you bottles. Once you place it on the bottle it fits tight and there are no leaks,so don't worry about they are no strong.