Now that plastic straws are evil, you can replace them with these metal ones, now just $8 for a pack of eight after you clip the $1 coupon. I use these at home, but you could definitely keep one in your purse or bag to use when you’re out and about as well.
The set also comes with a couple of pipe cleaners to help you clean the inside, but for what it’s worth, I’ve just run mine through the dishwasher for years, and I’m not dead!