All the years of travel have made us good at managing suitcase space. For example, this week I'm going to get rid of most of the underwear I've been wearing and a number of older clothes I brought along. This means at the end of our trips, there is always some space in the bags for a few items that didn't arrive with us.
I had to pick up my popcorn seasoning for the summer today. This item is most probably available in the supermarket we use in Canada, but carrying the bottle home will make it seem more authentic.