Glad Press'n Seal is a "multipurpose sealing wrap" It not only replaces plastic wrap as a food covering, but has many other uses as well!
According to the box, Press'n Seal employs "Griptex" technology -- it is activated when pressure is applied -- and sticks to almost anything.
This stuff is amazing! It really does lock out air by completely griping plates, cup rims, you name it. I use it alot for food storage (not only leftovers on a plate, but it works perfectly on the rim of a yogurt cup). Beverages will not spill out, either! I've also used this to cover a table before my children fingerpaint, and when I needed to cover a small area the drop cloth didn't cover when painting a room.
I will never buy plastic wrap again -- this stuff is just too good!