If you're going offgrid (and perhaps even if you aren't) composting your waste makes a lot of sense. From my findings, The Nature's Head composting toilet is the best option hands down if you're taking the (which I highly suggest) the composting route. See link below to purchase. BTW, this isn't a paid endorsement or anything like that. My Dad bought this toilet with his own money based on my suggestion, nothing else.
Buy on Amazon here: http://amzn.to/2sOeIjE
Subscribe: http://bit.ly/1QoPzmt
Tiny houses listed for sale and rent daily: http://tinyhouselistings.com
Tiny houses for sale in your inbox: http://eepurl.com/bAcWb
Instagram: / tinyhouselistings