Amazon offers the Eccotemp L5 Portable Tankless Water Heater for $90.90 with free shipping. That's $4 under our mention from last week and the lowest total price we've seen. (It's the best deal now by $4.) This 37,500-BTU water heater runs on liquid propane and features a shower head, garden hose adapter, and a 1.5 gallons per minute flow capacity. It uses two D cell batteries (not included).