Amazon's automatic Dash refills now include filters for Brita's smart water pitcher equipped with WiFi wireless connectivity. The Infinity water pitcher orders replacement filters when the purifier has almost reached its limit. This Internet of Things (IoT) gadget provides another option besides tap water and bottled water.

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The sensor-containing smart water pitcher costs $45 and the replacement filters have a $6 price tag, according to Engadget. Amazon named Brita as a partner when it first announced its Dash Replenishment Service automatic-reordering system for smart appliances.  

The Brita Infinity pitcher works by tracking the amount of water flowing through the unit. It orders new filters via Dash Replenishment service when it detects about 40 gallons (151 liters) of water have flowed through the purification filter of the IoT gadget.

Brita's pitcher holds up to 8 cups (1.9 liters) of water. It is also free of the chemical Bisphenol A (BPA) that has been used for over four decades to harden plastics, and caused some "concern" by the Food and Drug Administration (FDA) about possible effects on humans' brains and behavior.      

Infinity will be on sale at Amazon and a 3-pack of replacement filters will cost between $15 and $20.

The 50-year-old German company reports that the two lithium metal batteries in the smart pitcher should last almost five years when stored in a cold area. A refrigerator would be ideal.

Infinity is the first connected water filtration product the company has sold and helps it to compete with rising bottled water sales. Past models have included electronic filter indicators but not tech used to send electronic signals.

Amazon first announced its Dash Replenishment Service last spring and launched it at the end of January. Companies including General Electric, Whirlpool, Brother International, and Samsung's printer division have announced products that will function with the service.

IoT was a big part of the recent Mobile World Congress (MWC) in Barcelona. That included smart shoes from a Samsung-spun startup that can provide data about running mechanics and golf swings.  

Iofit's Smart Balance shoes are charged wirelessly and include pressure sensors that measure various metrics including balance, center of gravity, and weight-shifting. Data is streamed from the footwear to a mobile app that produces charts and maps, according to The Verge.