I support 'going Green'...however, keep in mind, "Green" product companies are also in it to MAKE MONEY. Many of these things you can MAKE so much cheaper, with what you already have in your home. The investment in time to find them is well worth it.
Sweeping up is a great Montessori practical life activity that can be adapted in many ways! Different materials (water beads, rice, small objects, sand... anything!) can be switched in and out as themes in your classroom change to keep the work alive and exciting.
I love the idea that all the cleaning items are in one spot. Practically in our house is another matter! Can set up an area in the cleaning cupboard to store cleaning items and have pegs for aprons etc? This would clearly define work areas.