I love these plastic freezer jars by Ball. I found them in 8 and 16 ounce sizes. I envisioned using them for picnics and in our travel cooler.
Today I made the large box [.60 oz] of Jell-O and used the 8 ounce size to create single servings. Just grab one and top with whipped cream and you're ready to enjoy a snack - quickly! Filling about 2/3 to the top made six servings.
And, after they cooled in the fridge I added the lids to keep the Jell-O top from getting that, well, hard rubbery texture that happens if left uncovered.