We like seeing the recycling problem being attacked on multiple fronts. For example, single-use spray bottles are recyclable, yet for various reasons only 7% of recyclable plastic actually makes it into the right pile; so Replenish is a spray bottle that aims to extend its lifetime within your household.
Billed as a "disruptive new household cleaning product," Replenish is a durable bottle made from PET-1 (the most-recyclable type of plastic) that essentially comes to the consumer empty, with a "twist-on concentrate pod" containing concentrated cleaning solution. Fill the thing up with water, mix, and you're good to go. Once it's drained, you can buy more pods with different types of cleaning solution in them, and again, you refill it with water you've already got on tap. This means there's a lot less to truck around, as only 5% of the weight of your typical spray bottle is the actual active ingredient; the rest is plastic and water, needlessly adding to the carbon footprint.