This is new old stock.  The Stronglas replacement filler with shock absorber feature is for a 10 oz. size wide mouth thermos bottle with screw-down leakproof stopper.  The box has tape on the top where it was taped to hold it shut. 

If you have any questions about the item, please feel free to contact me before making your bid or purchase.  If after receiving the item there is a problem with it, please let me know before leaving me feedback as anything than less than 3 stars affects my Seller status.  This is my only means of income and I cannot fix what I don't know about.  I try to inspect every item thoroughly before listing but I have over 4000 items in my store and sometimes things slip through the cracks.