I found some cups at Target that had a wider straw, they have a "Cars" picture on them. The wider straw makes them much easier to clean because the smaller brush of our bottle brush fits into the straw. The other way I found to clean the cups and straws is just to let them soak in really hot soapy water, It's not perfect but it is pretty good.
I also don't have a dishwasher. The Cars cups with straws are my favorite straw cup, my son never really took too well to sippy cups. I do have some of those "disposable" sippy cups though - the ones that are dishwasher safe toss aways -and those come clean pretty easily too. They are about 6 months old now and are still in excellent shape, those are the only sippy cups we own. I did need to use a pin to make the holes a little bigger though because they weren't actual holes when we bought them so nothing was coming out of them.
at 9:25 AM on Mar. 7, 2010