Cook eggs for breakfast sandwiches in a cookie cutter, then freeze for later.

I know this isn’t answering your question, but I have found it useful once I realized I was getting all those offers.

Assuming you are in the US, this is a good way to avoid quite a few of unnecessary offers: https://www.optoutprescreen.com.

I have used the permanent. It works well. Any bank you bank with will still send you offers.