Nature's Head Composting Toilet
The default pick for vans, boats and cabins: a proven urine-diverting toilet with a crank, a tiny fan draw and a five year warranty.
Amazon $1,035 Nature's Head $965$965
3.5/5
For vans and campers that want a seat closer to normal height than the Evo S without needing power.
- 6 usesCapacity
- None neededPower
- 2 yearsWarranty
Check price at Amazon$519.99
Price checked October 31, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Taller seat than the Evo S at 14.2 in overall, more comfortable for adults
- Needs no power; an optional 12 V fan kit adds ventilation
- Light at under 10 lb and holds up to 330 lb
Cons
- Capacity is still small: up to 10 solid uses by the maker’s figure
- Costs much more than the Evo S for a little more height and capacity
- No fan included
The Trelino Evo family
Every Trelino Evo model we rank, smallest first. Ratings compare each against its own type.
| Model | Capacity | Rating | Price |
|---|---|---|---|
| Trelino Evo S | 6 uses | 3.6/5 | $299 |
| Trelino Evo M (this one) | 6 uses | 3.5/5 | $519.99 |
| Trelino Evo L | 11 uses | 3.5/5 | $619.99 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Specifications
| Model number | EVO M |
|---|---|
| Capacity | |
| Type | Urine-diverting |
| Uses per solids bin | 6 uses |
| Urine bottle | 1.3 gal |
| Urine drain option | No |
| Agitator | No |
| Power and venting | |
| Power | None needed |
| Build | |
| Dimensions | 13 x 15.4 x 14.2 in |
| Weight | 9.5 lb |
| Material | Recyclable ABS plastic |
| Warranty | 2 years |
Alternatives in this type
Trelino Evo S
#10 in Urine-divertingFull review
A light, power free diverting toilet for weekend van trips, tents and boats where space matters more than capacity.
Amazon $299$299
Trelino Evo L
#12 in Urine-divertingFull review
The roomiest Trelino: a power free diverting toilet with near normal seat height for longer van trips and small cabins.
Amazon $619.99$619.99
Compare
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