N.W.
I bought a set of pyrex glass bowls with no-leak lids. They work great and I even put them in the freezer. The whole set costs around $30 at Costco and has an assortment of sizes and shapes. I also use Corningware serving bowls, the kind with the glass lids. The hold alot when I have enough leftovers for another meal.
For dishes, I bought inexpensive sets of seconds at Ross. They were cheap so I got about 20 place settings, figuring my kids would probably break them when they washed dishes. Many years later, not one has broken! They go in the microwave and look nice, too.
You can get stainless steel mugs and water bottles in place of plastic cups. Around here, we each have a different color/style water bottle aso don't have to wash after every use. Some have the (plastic) pullout squirt top which might be a good transition from a sippy cup.