We have several indoor cats. Please, no adverse comments from cat haters! We use a fair amount of cat litter, which I have usually purchased in cardboard boxes which we then recycled. I have recently started purchasing 40 lb. containers of litter in plastic pails with tight fitting snap on lids. I will now have a regular supply of plastic containers in which to store items which I don't want to leave exposed. The containers can also be used to store water if necessary. One little change to my routine, but it will hopefully help me prepare.