- Try non-clay litters such as corn and wheat based ones.
- Get unconventional and try sawdust, mulch, and dirt which you can buy package free from your local landscaping store.
- Using a compostable litter enables you to compost the poop and pee. Many local composting facilities don't allow animal poop, but some do; check the rules in your area. If you have a backyard, you can compost it at home. Make a special compost pile for this use only (don't mix it in with a compost pile you use for your edibles).
- Some non-clay litters are marketed as flushable, but do not flush it down your toilet. Some cats have a parasite called toxoplasmosis which is found in cat feces and has infected marine mammals and otters
- Look for bulk cat litter. I've seen this at Petco before, but it's not at all of them. I've seen them refill it using plastic tubs, so note this isn't a perfect zero waste solution.
- Opt for litter in paper bags and paper boxes. Sometimes this is lined with plastic, or re-enforced with plastic strips (since litter is so heavy), and therefore may not be allowable in paper recycling. But it is less plastic, which is good.