Calor

When you sign up with Calor they charge you 33 Euro under the pretends it would be a deposit for the bottle. Deposit implies that you get your money back when you return the bottle. That is a blatant lie. In fact they do not return the money. When you return a bottle you get payed 6 Euro under "certain circumstances". This leads people to not return their bottles. Not only are their policies intransparent and highly unethical but also extremely hostile to the environment.