What to look for:
Make sure the container is designed to be airtight. Do NOT pour the cat food directly into the container like the manufacturer meant for you to do. Instead, leave the cat food in its original bag and place the entire bag into the storage container. For this reason, you'll need a bigger container than the manufacturer's description says (ie you'll need the 10-lb container for a 5-lb bag of food, the 25-lb container for a 10- or 15-lb bag of food, etc).

The reason why you should NEVER pour the dry kibbles directly into the container is 4-fold: (1) exposing the food to air speeds up the degradation process, and by pouring the food out, you're exposing the entire bag of kibbles to air; (2) the original food bag is designed to keep out moisure and UV-light much better than the plastic storage container does; (3) the oils/fats from the dry food will stick to the sides and bottom of the storage container and go rancid quickly, then contaminate your next bag of food unless you scrub/clean out the container very thoroughly between bags, which most people just won't do; and (4) you should keep the original bag which contains the expiration date as well as batch number in case there's a recall later (of course, you can theoretically save the bag after you pour the food out, but someone else in your family or yourself might see the empty bag and throw it out not knowing or not remembering that you still need it, or you could confuse which bag is which if you have mutliple pets on different food).

Where to buy online:

Iris Airtight Pet Food Container, 25-Pound, Clear/Black 8.1-gallon, 17"H x 13.5"W x 14.5"D Click here to buy from Amazon

Iris Airtight Pet Food Container, 10-Pound, Clear/Black Click here to buy from Amazon

What to look for:
In lieu of (or in addition to) an airtight food storage container, it helps to squeeze out the air from the dry food bag and fold down the top of the bag and keep it closed with a clip. Any large sturdy clip should work, even binder clips.

Where to buy locally:

• Many stores should carry some kind of clip in either their kitchen gadget section or office supply section

Where to buy online:

OXO Good Grips Bag Clip Click here to buy from Amazon Pack of 2

ACCO Binder Clips, Large Click here to buy from Amazon Pack of 12