You can see one in the second picture, on the rounded shelf. They showed up on the market 30 some years ago and for years almost every store had them on the shelves around Xmas time. They were 11 inches tall, 10 inches diameter and generally had a three way cardboard divider in them. Each section of the divider contained a different flavor of popcorn, most commonly butter, cheesy and caramel. The outside of the tin was decorated with colorful pictures or designs, often with a Xmas theme. Below is a great picture of one showing the contents.

I collected a number of these and most are used to store items in. I have one with candles in it and I use some to store the pet foods in. They are particularly handy for storing grain based food, like noodles, cake/bread mixes and flour. Because I have birds and do dog rescue, there have been times when there has been an outbreak of pantry moths. They are relentless in seeking new places to lay eggs, infesting any number of grain products. I found that the tins were one thing they could not conquer so I took to using them to protect my food stuff.

Sadly, these tins, which were very affordable, have suffered at the hands of greed and capitalism as has much here in the states. The tins are not only smaller than they used to be, they are now more commonly "filled" with 3, rather small (maybe 3-4 cups) bags of flavored popcorn. Price remains comparable to years ago but you get much less corn and smaller cans. I've not purchased one for probably 10 years but my old ones serve me well.

@DotLewis Thanks for the detail! The popcorn tin looks nice. Although I deprecate excessive packaging as much as anyone, I do like it when things I was going to buy anyway come in pretty boxes and tins! I know what you mean about food moths. We had an infestation some years ago and keep a very careful eye on dry goods now -I agree, keeping them in tins seems to be an effective method.