One of the best Halloween Costumes my mom ever made for me and my sister were are a "side of fries" and a "strawberry shake." I was the shake.
I remember riding all around town with my mom as she gathered the necessary elements to our costumes. Some things were easy: poster board, magic markers, stapler and staples, even stuffed animal stuffing from the fabric store. Some elements were fun, like eating at Burger King while my mom sweet-talked the lady behind the register into giving her several extra classic chicken sandwich boxes that would later be used to cover our shoes. Other items were more tricky, like finding a place in Knoxville, Tennessee in 1983 to cut foam rubber pieces into french fry strips. I remember a very long drive to a side of town with which I was completely unfamiliar. We had to make two trips to that foam store, one to place the order and one to pick the order up.
My mom cheerfully tuned out our complaints as she drove around shopping for and constructing these marvelous costumes. She meticulously hit every detail: red and white striped socks, Burger King shoe covers, neatly printed logos with magic marker, red and white blouses to wear underneath the costumes, pink spray painted synthetic stuffing for the frothy milkshake, and a styrofoam pole decorated with a red ribbon for my straw.
Sadly, I think I ended up going as a store-bought costume that year instead of the shake because I wanted to be like my friends. I'm just so glad that she made us put the costumes on even if it was just for this picture.
You can easily make this costume yourself with the afore mentioned supplies. And if you want to update it to a more adult version, you can turn it into "Master Shake" and "Frylock" from Aqua Teen Hunger Force on Adult Swim.
*And, if you don't have time to find a foam cutter you can substitute them with yellow pool noodles.