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.
Answers. Relevance. Rating Newest Oldest. Best Answer: DONKEY-The domesticated *** (Equus asinus). JACKASS-A male *** or donkey. MULE-The sterile hybrid offspring of a male donkey and a female horse, characterized by long ears and a short mane. BURRO-A small donkey, especially one used as a pack animal.