Quote Originally Posted by Trekhawk
Hmm not sure how you would get rid of that taste. I dont let mine stand with dish soap in them. Just wash, rinse, drain to dry and have never had a problem with soap taste. Perhaps its the sitting with dish soap in them thats causing the problem.
and:

Quote Originally Posted by Grog
I don't think the soap is more efficient by being left in the bottle overnight. It would be maybe for a greasy pan, but not for a water bottle. Plus, I'd say the soap smell is sign that that plastic is rather porous....

Just wash, rinse, let air dry... throw away and get a new one once in a while!
Oh, it wasn't that long. We're talking 5 minutes while we were making lunch, then I squeezed and rinsed the soap out, along with a bunch of water rinses. Then, we put lemon juice in them, and let them sit for a while (maybe 30 minutes), then rinsed them again. The water didn't taste soapy when I drank out of it at first, but after letting *plain* water sit in them all night (in the refrigerator), the water tasted soapy. I would have expected lemony, but clearly the soap just got right into the pores of the plastic and is hanging on for dear life!

I have a mental block with wasting water, I guess I just need to rinse them more, and let them air dry. And, use them

(PS: They are brand new, so it's soap smell or plastic smell... take your pick )