I learned about reusing (carefully cleaned and dried out) juice bottles to use to store dry foods like lentils, rice, flour, sugar, etc. I am excited to do this. I am also using milk jugs but some people would only use PETE plastic. Here are some links. https://www.thriftyfun.com/Reuse-Jugs-for-Dry-Foods.html https://theprovidentprepper.org/packaging-dry-foods-in-plastic-bottles-for-long-term-food-storage/ it should keep insects out but rodents can chew through the plastic. if you have a rodent problem you can just store the jugs of food in thicker plastic containers though

you can wash out and reuse the little plastic tub containers that things like yogurt and cottage cheese come in and if you like, you can remove the ink labeling with a cloth or paper towel, 100% acetone nail polish remover, and a little bit of elbow grease I'm really excited about getting free containers

this (tumblr) blog is really inspiring to me, has loads of tips for clothing repair, sewing, knitting, crafting on the cheap https://wastelesscrafts.tumblr.com/