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- Oct 27, 2011
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Shampoo is not anti bacterial like most washing up liquids. Washing up liquid is designed so that you cant taste it, if you use shampoo make sure you rinse it really well so that you can't taste it. But practices like that can spread bacteria.
All the dish detergent sold in my local stores most certainly tastes like soap

How do you wash the refillable bottle/cup? I'm not being a smart aleck (honest!), but am genuinely curious. Do you bring dish soap from home and wash it in the sink in your room?
We travel on most vacations (cruise or otherwise) with a small travel-sized bottle of dish detergent. There are also pre-soaped papertowels on the market now, or I've heard of people who create their own and put them in a zipper baggie. We clean refillable bottles in our stateroom or hotel room each evening. But we are regular users of refillable waterbottles around here as well so it's not particularly different for us to rinse and clean them each evening.
Enjoy your cruise!