We've been using a sealed container for dog food, and it's worked okay but it's plastic and we've had it a few years and was getting more difficult to clean, and the lid was starting to feel flimsy. We live in a tropical area and have to do whatever we can to keep bugs from being tempted. This seals even without the vacuum feature, it has a tight seal which will keep the food fresh, bugs and pests away.
The vacuum feature is easy to use, just make sure the "on" button is set. You close and snap the lid, then push the button, hear the vacuum happening. Then just vent it to open the container. My dog has allergies and eats expensive food and topper, so I'm glad to know it will stay fresh and not go to waste. Another thing I like about this is that it looks nice. Our other container was clear with a black lid, and I like this one better. It also holds the same but has a smaller footprint, so I can keep it on the doggy cart with his treats and other things. It's also super sturdy feeling.