Jiffy bag 
noun trademark
A padded envelope for protecting fragile items in the post.And for designer purchases, buy a Jiffy bag and mail them home....
- When I got home today, a small Jiffy bag was waiting for me.
- Pick up the phone early one day, and it will come through your door in a Jiffy bag the next, in tip - top condition.
- unseemliness
- unseemly
- unseen
- unsegmented
- unsegregated
- unselect
- unselected
- unselective
- unselfconscious
- unselfconsciously
- unselfconsciousness
- unselfish
- unselfishly
- unselfishness
- unsellable
- unsensational
- unsensationally
- unsentimental
- unsentimentally
- unseparated
- Unser
- unserious
- unserved
- unserviceability
- unserviceable