Once you fill your IBC, you will want to make sure nothing else gets in there. Keep your tote away from foreign objects and unwanted dust with a dust cap. Just make sure you get the right one for your intermediate bulk container. It will make the job a lot easier when transporting or storing. Email us if you have questions about which one is right for you, and send a picture of your opening. We will see if what we have is what you are looking for.