You’d be surprised how many stores sell bleach, soda, baking soda and citrus acid. It’s cheap, very low in waste, and less to carry from the store.

The ones I have even describe how to use them for different use cases. Basically you just put it in some water. A package costs like a euro and lasts you a year if not years.

Edit: Here’s the list:.

• Water: Helps you mix and rinse; cleans almost everything. :)
• Washing Soda: Great for tough stains on clothes and hard surfaces.
• Baking Soda: Sprinkle on carpets or scrub sinks; it’s a gentle cleaner.
• Bleach: Need to kill germs or whiten whites? Use bleach, but carefully!
• Citrus Acid: Makes your kettle or showerhead shine by removing scale.
• Rubbing Alcohol: Perfect for glass and wiping down surfaces; dries fast.
• White Vinegar: Mix with water for an all-purpose cleaner; good on glass too.
• Borax: Boosts your laundry detergent; helps keep bugs away.
• Sea Salt: Scrubbing a pan? Sea salt helps scrape away the tough bits.
• Castille Soap: Wash floors, dishes, or even pets; it’s mild and versatile.