咖啡
kā fēi
(loanword) coffee
CL:杯[bei1]
mouth (口咖) + mouth (口啡) = a borrowed sound for coffee
Both characters were chosen purely for how they sound: 咖啡 approximates 'coffee' in Mandarin phonetics. The mouth radical 口 appears in both simply as a marker for characters used in phonetic transcription of foreign words.
我每天早上都喝一杯咖啡。
wǒ měi tiān zǎo shang dōu hē yī bēi kā fēi。
I drink a cup of coffee every morning.
这家店的咖啡比附近其他店的好喝多了。
zhè jiā diàn de kā fēi bǐ fù jìn qí tā diàn de hǎo hē duō le。
The coffee at this shop tastes much better than at other nearby shops.