Fake “beer” for tailgating?

I’m pregnant but I’m keeping it secret until thanksgiving. I’m going to a football game in a couple weeks where we’ll be tailgating with my parents and family friends and I’d love to throw them off the scent by “drinking,” but I’m trying to think of a convincing way to “drink” obviously without actually drinking alcohol.

Do you think I could get away with dumping out a couple bottles of Mikes Hard Lemonade and refilling them with normal lemonade? Do the twist caps re-twist?

Any other ideas? It’ll be BYOB so I can definitely prepare something but idk what to do!

I’m not a big drinker so if I just don’t drink it won’t be a dead giveaway, but I know my mom is suspicious (she knew we were TTC) so I’d love to throw her off by knocking back a couple “alcoholic” beverages 😂😂