Remember that tuna can project a few weeks ago? Admit it: You were wondering what I did with the lids. I knew it.
I use a seven-section pill container for my vitamins. It had a reserved place in a corner of one of my kitchen cabinets, but I kept forgetting about it because it was tucked away, out of sight.
I wanted a place for it that I'd always be able to see, but I didn't feel comfortable leaving something personal (and perhaps dangerously attractive to children) out in the open.
The solution was to glue-gun magnets to the back of the container, and stick it to.... something metal.
The "something metal" was the tuna can lids.
I washed them well, and lined their potentially sharp edges with glue from the glue gun. When the hot glue dried, I used leftover 3M Command strips to attach the tuna can lids to the inside of the cabinet door.
(I didn't want to do anything that would ruin the cabinet door. The clothespins in the picture are also held up with leftover command strips. I put them there to hold in-use recipes.)
(I'm a big fan of those Command Strips. The package with hooks usually comes with extra adhesive strips, which I save for projects like this. I've even used these strips for a friend's seasonal rental apartment, where nails were prohibited, everywhere, including in the shower and to attach mezuzot firmly to the door-frame for a season. They stayed up all summer and removed completely with a single stroke.)
This has worked really well. The tuna lids are very thin, so the combined width of the pill container fits in the gap between the edge of the shelf and the cabinet door. I was able to put them up higher than the children's unaided reach.
The best part is, I haven't forgotten to take my vitamins since setting this up, three weeks ago!