What's funny is I ordered the Tide sink packs but then cancelled my order as I was Googling since I read I could use shampoo. I might just plan to use shampoo and give it a try, I was curious if anyone had tried it but if I'm the first I can report back. 🙂 I'm thinking the less I have to pack the better because we have so much luggage already. It's a problem. I should add, I am taking dish soap, though, to wash our water bottles. That's a huge priority so I can just make sure it's the proper kind of dish soap for clothes washing.