The vowel sound in “showers” and “flowers” is “ow”, as in “Ow! I stubbed my toe!” This is the sound in several common words, such as “about” and “how”. Some non-native speakers, such as those from India, say this sound a little like “o”. The “ow” sound is like a combination of “ae” as in “cat” and “o” as in “go”. Open your mouth widely at the beginning of this sound and then round it at the end.