Since we are home for the summer, the need to make bentos has been few & far between. It's hard to get on board with handwash-only items when we are eating at the kitchen table.
On my travels around the web, I did find a fun site that talked about Muffin Tin meals. It's similar to a bento concept, I suppose, but in muffin tins--one compartment per item. And muffin tins are dishwasher safe.
We've done it twice already, with themed meals!

Alphabet theme--Apricots, Bananas, Cheese, Donut, Egg, Fish

And a number theme--1 cupcake, 2 carrot sticks, 3 slices of turkey on kebab sticks, 4 pieces of cheese, 5 crackers, 6 chunks of canteloupe
Despite the fact that my children take bentos for school, they were thoroughly impressed by these.
ETA:
LINK to Muffin Tin Mondays
ETA2: For my local friends, the muffin tins were from the Dollar Tree by my house, so now $4/tin at Target!