I absolutely love these for my meal prep. They are glass so no chemicals (excluding the lid) and they have dividers so you can separate proteins carbs and veggies.
FIT Strong Glass Meal Prep Containers 4-Pack
This is both functional beautiful so it doesn't look like an eye sore on your countertop. I use it when I am tracking macros and weighing my food, and for precise baking.
Homebuds 33lb Digital Food Scale, LED, White
Perfect for overnight oats or prepping parfaits. The lids won't rust like traditional mason jars.