I have a distant memory of using an avocado plastic cup-holder with disposable thin plastic cup "inserts". I believe these were old Tupperware but can't recall much more than that. We used to take them on road trips with my family, and I was reminded of them when I came across these cute colourful cups made in Holland.
I purchased these three Dutch cups in perfect condition for $1.50. I think they're shaped a bit like fragile eggs with their rounded bottoms; in fact their shape reminds me of the stemless Riedel wine glasses.
The green, brown and orange colours are so similar to Tupperware pieces we had in the 80s. Does anybody know these cups I'm thinking about?