This month's favorite is Fool-A-Bug Pet Bowls. Feeding feral cats outside or any pet outside for that matter, can be a problem because of ants. I have had the problem of ants getting into the pet bowls inside the house as well. So how do you keep those pesky ants out of the bowls? The Fool-A-Bug Bowl is the solution! The design is very simple. It has little legs on the bottom that keeps the bowl off the ground just enough to keep the ants from crawling in. Though I've only found them in one size (large), you can put a smaller bowl inside of it. Best of all, they now have them in stainless steel. (Stainless steel is easier to keep clean and doesn't harbor bacteria like plastic, or leach toxic chemicals. Some cats are allergic to plastic too.)
I have tried the bug-proof bowls that have a mote around them but the problem with those is you have to keep filling the mote with water and the water gets all yucky. The Fool-A-Bug Bowls work great! You can find them at Amazon.com, Walmart, Academy and many on-line stores. You may have to do some searching to find the stainless steel as most places stock the plastic.