"I have both the large and small size of this stacker. One for our dog and one of the cat.
It keeps food pest free and in an area where we are at war with ants and other critters, this has been the best. The dogs can't chew into it either :)
The way the opening is angled, there are no spills. The cups inside are great for measuring out the appropriate amount of food for your pet.
It is a nice high impact plastic. More importantly for me, the lid is very easy to spin open and closed. As someone with arthritis and connective disorder in my hands, the simplicity and ease is important to me.
The fact that stacking the bins saves me space by not having big bags of food slouched over in the kitchen cupboard is an added plus.
I would absolutely recommend this product and in fact already have."