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Without a cap or substitute, the toothpaste in the neck of the tube becomes the cap which you can squeeze out and discard. The technique is called pre-pouring and has been used in medicine for decades. In this instance, we're not referring to pre-pouring in the sense of dispensing a single dose amount of liquid medication from a multi-dose container well in advance of administration; rather, we're talking about pouring off a quantity of something that's cream to ointment consistency which may have become contaminated where it comes into contact with the outside of the container or anything else.
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