Crazy question-can adult drink baby formula?

This might sound crazy but I have a whole can of Similac step 2 formula that my baby refused to take. She's been EBF for 6M and decided to start giving her formula as I introduce solids but she wont take it and her skin around the mouth gets red with hives whenever I give her so I've decided to stop. So I'm wondering what I should do with the full opened powder formula, and it says that it expire 1 month after opening🙄

Is it okay for me and hubby to just drink or or just toss it away? Lol

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