Ordinary brown paper bags will do the trick, but the key is to keep the chain of evidence so that it can be used against her....here is what a normal evidence bag looks like...I know it's fancy scmancy, but you can get a good tip from what it has informationally.
We'd love to have your evidence included with ours, but you have to make sure that you keep the chain of evidence in tact...so you want to make sure you photograph it before you bag it, then bag it, seal it and log it before getting it to my team....
Here is a good evidence bag...plastic bags can degrade biological evidence so if you have any questions please contact my team and we will talk you through it or send someone over to collect it. You can't trust the PSPD, but I do recommend reporting it to them and keeping a record.
Happy Lisa evidence collecting...nothing is unimportant: