I don't think they're water tight, maybe slightly water resistant if that. I've never gave them a thought in our shower. Now it's something to look at when we unwrap it.
If you're going to "regret it in the morning", sleep until noon.
2012 Jay Flight 19RD
2016 Ford F150 XLT 2X4 SC 3.5L Eco Max Tow
2010 Tundra TRD DBL Cab (Traded)
2 new fluffy Corgis, Bayley and Stanley