We have some of these. I have had no problems with them, but Jim had trouble with them and managed to pop the lid off when trying to open it. Maybe his manly strength was too much for it, LOL. So I still use them, and he uses the small rubbermaid storage containers with spillproof lids.
https://www.amazon.com/Rubbermaid-Easy-Find-Storage-Piece/dp/B0012DMSTK
(and they even show them filled with olives, although the big photo shows lime wedges)
Allison

: You made me smile with this report
:
: Here is what I use
:
: https://www.amazon.com/Evriholder-Dressing-Containers-Condiment-Leak-Resistant/dp/B00LPZQUS0/ref=sr_1_10?s=kitchen&ie=UTF8&qid=1526820186&sr=1-10&keywords=salad+dressing+container

: Kathleen