I have a lot of them. There not woth much. Just hoping they may be worth something in the future. If I find an exspensive one I would put the money and get it graded by ICCS or CCCS.
What, now? You can certainly stretch the new "Saran Wrap" over an object, and it will retain a little bit of tension, but it doesn't "shrink". I've found posts on the Internet saying that it does, but I think most of them are based on the old formulation.
I've unwrapped a lot of coins that were wrapped in plastic wrap and found a lot with very unattractive lines on them from the creases of the wrap. Save up a few bucks and buy yourself proper coin holders.
I would be the third to discourage you from using aluminum foil. While popular for a while wrapped over paper, some of the worst coins I have ever seen were from rolls where the aluminum foil came in contact with the coins. It will over time promote chemical reactions that you do not want to see. Never let aluminum touch your coins. Tristen, I understand you are a YN. I still would think you could ask for some flips or better containers for your coins as a birthday present. We were all there once, I remember asking for a "coin collecting kit" from JC Penney in the 70's when I was a kid. Don't become discouraged because you cannot buy "expensive" coins, its knowledge that makes a collector, not a check book. Strive to learn as much as you can.
Actually Chris there was a time when some people did wrap the coins, not the paper rolls the coins themselves, in aluminum foil, and then insert that into a paper roll, to prevent the coins from toning. And yes these were copper coins. And yes it worked. Quite a few years ago it was even posted about on this forum by a member who is no longer with us - Catman. His name was Steve, a good personal friend of mine. And he did that exact experiment with rolls of cents that lasted for decades. He rolled them up back in the '60s, opened those rolls after 2000. And the coins were pristine. Now that said - DO NOT roll your copper coins up in aluminum foil to store them. Chris is right. Copper and aluminum do not mix. When the two touch each other, and moisture is present (and that can even be moisture from humidity in the air), an electrical current is created that will severely corrode the coins. You see Steve was lucky, he knew all of this. But he also knew that if he could keep those rolls from being exposed to any moisture that the experiment should work. And he was right, it did. But then Steve also lived in Nevada, the driest state in the country. So just because it worked for him, that does not mean that it will work for you. DON'T DO IT !
What are you investing in to make you money? Are they coins. The reason I ask is because firstly, coins are a terrible investment. They are highly unpredictable and common drop in value. Don't collect to make money, collect because you enjoy the hobby. Secondly...would you buy valuable painting and then store it in a manila envelope? Of course not. So, why would you spend your hard earned money on coins and then not take care of them. Part of this hobby is the protection of the coins...not just the accumulation. And protection costs money. I understand you are young and have a limited budget. Based on that, I assume the majority of your collection is low dollar coins. That is fine, it's where we all started. But, be proud of your collection and store them safely. Honestly, I would go to a local coin shop and pick up some 2x2 flips. I'll let for less than 1 weeks worth of money (which you said was $15) you can get enough 2x2 holders to make care of your collection for months.
Tin foil around the outside of paper-wrapped rolls of coins is okay. It's a sacrificial metal that leaves the coins inside looks mint new. But, as others have mentioned, don't let it come into contact with the surface of coins as it can scratch them. I've bought many a roll of cents in aluminum foil covers, and all of them were near original mint luster rolls. Saran wrap around the outside of pill bottles might be better than inside the bottle.
I would not wrap them in anything. Try to use a cylindrical pill bottle that has a diameter which is approximately that of the coin. If it is a little big, slide enough cardboard down the side of the tube to stop movement.
Cardboard is likely to have sulfur residue, which will cause toning. It's really not the right thing to use if you're trying to keep coins bright.
There must be some kind of paper or cardboard that will not hurt. What about the cardboard from 2 x 2's?