DealGenius via offers the NitroStrike Mini-Foamer 16-oz. Fire Extinguisher 2-Pack, model no. 88670, for $8.99 with free shipping. At $4.49 per extinguisher, that's 49 cents under our mention from last month and the lowest total price we could find for a pair now by $14. These portable fire extinguishers shoot up to 10 feet for up to 25 seconds and feature a biodegradable liquid foam.