Subscribe to them in the spring and summer when our garden birds are feeding their babies. I feed them on grated carrot, banana peel, oat bran and oatmeal. Apparently it's a way for parent birds to hydrate their chicks in the nest so I try to give the mealworms loads of veg, chopped red cabbage, lettuce, beans etc. I leave a little bit out with them when they go outside to feed the birdies, so they don't get parched in the sun.
Basically the best water bowl I have ever used for my geckos and they love them as well