Garden scoop (or dustpan) from plastic bottles. Other handy ideas on this page too, although it's in Spanish (google chrome will translate for you). Plastic Bottle, Make Life Easier, Milk Jug, Milk Cartons, Lifehacks, Milk Bottle, Great Ideas, Life Hacks, Households Tips
Cut and decorate an old milk jug as a scoop 'n' storage holder for small toys and items. Check out this website for 25 tips and tricks for getting organized.
Crayon and coloring book travel case featured at the blog "seven thirty three." (Unsure why, but if you click to follow the link, up pops a Pinterest warning about the page being reported for spam. I didn't see anything spammy on the blog, just lots of cute craft and party ideas.)
Family living site Disney Family Fun shows us how to repurpose an empty milk jug into a lunch container by washing it out, drawing lines as shown in the photo, cutting it out, folding, and attaching a hook and loop closure. This container is perfectly sized for a sandwich and a few carrot sticks or grapes. If you don't want to use this for food it also makes a clever gift box for small items.
Mettez un demi-litre de lait dans les tablettes des chaussures pour le stockage de chaussures empilable.