JHoss,
Looks great!. I have been using used styrofoam coffee cups - easy to poke holes with a pencil and they are free. I was using some plastic cups that lemon ice came in (and other assorted foods) but I totally ruined a solder iron on putting the holes in the container ............ so how much money did I save in the long run? I had to replace the iron. Styrofoam can be poked with a pencil.
BTW, guys, it is not only apple seeds that can be cold sown in this way - it is called "winter sowing" and some people make a big thing of it but it is an ancient concept. The planet has been doing so for millions of years only some people like to claim credit for their "novel" ideas. Bottom line is that lots of veggies and flowers can be winter sown in milk jugs and various plastic containers in which we buy food, then throw away. The ones which the rotisserie chickens come in is ideal because they have a plastic cover. Look up "winter sowing" on the internet for info on how it is done. Come spring, all manner of veggie and flower transplants are ready to go. It works great - better than indoor lights, in fact. Don't over seed the containers, BTW. Less is more else you will get a tangled mess.
Word of caution, you can't do tomatoes, eggplants and peppers in this manner. They do need indoor lights. For other stuff, however, it is great. The only caution is that you do need someway to protect the containeras from blowing away during the winter winds. Putting them inside a plastic crate works as does nailing the containers to a wooden board. Whatever works is fine. We are talking about disposable stuff here so you don't have to worry about reuse. Over the next summer and fall, you can collect more containers for the following winter. One other word of caution, come spring, don't forget to take off the clear plastic lids. It gets super HOT inside those containers on any sunny spring day and your transplants will fry to death, otherwise. Come April (in zone 5B), you no longer need the lids