KP KOOL PRODUCTSSuper Long 11" Flexible Spout with Tons of Accessories (2 Pack)

Are these actually flexible? I have purchased others which look flexible but when even slightly bent they pop out of the collar cap.

Will this work on the Midwest can model 5610?

Can you store the spout inverted into the can?

The package did not include the vents? Is there any way you can send them to us? Thanks