Vintage Chen Yu Lipstick with Unusual Spring Cap Unused

This lipstick tube is marked Chen Yu on the top and has a paper sticker in the cap and on the bottom of the tube.I believe the case is bakelite,but no sure as I am not an expert on plastic materials.It has a raised design on the main part and the lettering on the cap is raised.This tube does not roll up like most lipsticks.When you take the cap off,if you gently pull on it ,the lipstick pops up.T is a string attached to the cap and into the bottom of the tube.Apparently,this activates some sort of spring when pulled.The lipstick is unused and in good condition.The color is marked Chinese Red on the bottom.This is a great collectible vanity item.Thanks for looking and please visit my other auctions for more vintage vanity items I am listing.