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.
A donkey is a small type of horse, a mule is the offspring of a horse or a donkey, a burro is also a donkey, and a horse is a solid-hoofed plant-eating domesticated mammal with a flowing mane and tail. Chris Â· 8 years ago. Thumbs up. 1. Thumbs down.