Huzzah! A group in Germany has created a new food-grade polypropylene filament for 3D printers that is food safe and washable. Most current 3D printing filaments, while not exactly poisonous, can react in negative ways to moisture and acids, resulting in some nasty stuff. For example, you could use this to print anything from a plate to a pitcher.
The filament costs $129 for a 2 kg roll. Apparently, as we see from this picture, it also makes great candy dishes.
The plastic is as washable as any standard food storage container and it is highly flexible. It is produced according “to US FDA regulations and the relevant EU standards” to maintain safety and can even be used in children’s toys. Now, finally, you can suck on your 3D printed objects!