That was easy!
I know it will sound crazy, but I bought 2 sippy cups when they were about 6 months old and those are the ONLY sippy cups they have ever had.
The boys usually (weather permitting) go out for a walk every morning after their nap and we would strap the sippy cups on, then take them off for lunch, then put them back on the stroller if they went somewhere in the afternoon and then back off for dinner.
Sounds crazy. Two cups that I washed off/out multiple times a day.
This is how frugal I am!
For the straw cups, I'm going to do something really crazy. I'm going to go buy two more so I don't have to move them on and off the stroller! Plus, I know they will use these longer than 5 or 6 months, so I will get my money's worth, for sure.
After their first birthday, we'll put milk in them for their meals and see how that goes....
By the way--the brand that we use is Tommee Tippee. BBRUS usually has them buy one/get one 50% off. They don't spill at all and the boys love them. The only thing you have to watch out for is if your kid throws them repeatedly, there is a piece inside which comes loose and you have to unscrew the lid and put it back in. If that piece is loose, they can spill a little bit.
How many sippy cups or straw cups do YOU have for your child?