Raise the back of your tongue to touch the soft palate (velum). Stop the air, then release.

Americans pronounce caps as KAPS (/kæps/). You'll hear it in sentences like "The melting of polar ice caps has accelerated in recent years".
Record yourself saying "caps" and play it back. The mic stays on your device — nothing's uploaded.
1 syllable, 4 sounds. Explore each sound's mouth shape and how it's made.
Raise the back of your tongue to touch the soft palate (velum). Stop the air, then release.

Drop the jaw noticeably. Keep the body of the tongue low and forward, and don't let the back of the tongue raise toward the soft palate. Pull the lip corners back slightly, almost a starting smile.

Press your lips together to stop the air, then release. No vocal cord vibration.

Place your tongue tip near the roof of your mouth behind your top teeth. Push air through the narrow gap. No voicing.
