This is the audio exerpt of ʊ spoken within a word. It may sound a little short or unclear, but that's exactly how it's in the real context. For more details, read the below explanation of pronunciation and listen example words that contain ʊ by pressing the word buttons.
1. Open your mouth for about 20%.
2. Relax your lips.
3. Raise the utmost back of your tongue without touching the back palate.
4. Push air from lungs while vibrating vocal cords.
Often sounds are affected by the neighboring sounds. That's because during speach our mouth is always transitioning from one position to another. Below, you can find the most frequent syllables that include the sound ʊ.