Our Mini Spatulas (MPS95) are perfect for scraping the last little bit of paint out of paint cans up to 1 gallon in size. They fit on the end of a standard wood paint stick, so are very handy to store and use.
The 4" x 2.5" curved blade has just the right amount of flexibility to scrape the sides and bottom of the can, and the little tips get under the can lid to extract the pesky paint that hides up there. 
You can find the mini-spat at fine paint stores nationwide, usually on the counter next to the paint sticks.