Caffeine content can range from as much as 160 milligrams in some energy drinks to as little as 4 milligrams in a 1-ounce serving of chocolate-flavored syrup. Even decaffeinated coffee isn't completely free of caffeine. Caffeine is also present in some over-the-counter pain relievers, cold medications, and diet pills.
wren. noun. 1  Any of various small brownish songbirds of the family Troglodytidae, having rounded wings, a slender bill, and a short, often erect tail. 2  All species but one, which is Eurasian, are found only in the Americas. 3  Any of various similar unrelated songbirds.
In North American English, wrench is the standard term. The most common shapes are called open-end wrench and box-end wrench. In American English, spanner refers to a specialised wrench with a series of pins or tabs around the circumference.