If you use frequent but not daily eye drops, I suggest looking for packs of single-use droppers. They're marketed as sensitive -- they have no preservatives, so you have to throw them out within a day of opening, but it saves you from tossing a full-size bottle every month due to worries of germ growth.
Mule (smuggling) For other uses, see mule (disambiguation). A mule or courier is someone who smuggles contraband across a border (as opposed to sending by mail, etc.) for a smuggling organization. The organizers employ mules to reduce the risk of getting caught themselves.
The offspring of two plants or animals of different species or varieties, such as a mule. âthe bird was a hybrid of a goose and a swanâ. âBecause of a doubling of their chromosome number, these hybrids could no longer cross with the parental species but only among themselves - which they did not hesitate to do.â.