My MightyMug was an old birthday present from my friend Marina because I spilled a glass of water on my laptop, which was a real disaster! Since then, I’ve only used it at my workstation. I lost the lid a few days ago, so I ordered a new one. However, my wife recently found the old lid. Now, I'm wondering if there’s a way to use the 15% discount on a new aluminum cup (without a lid) that is compatible with the new lid I ordered. Thanks!