I don't think it is the same for soda water or tonic water, I'm not 100% sure on that though.
Cardiff Starbucks made a big deal of selling fair-trade coffee when they first started selling it and made people believe that they were an ethical company, actually only 1.6% of their coffee was fairtrade, the other 98.4% was from regular, badly paid coffee farmers, it was some very clever marketing as people see an advert saying they use fairtrade but never ask if that's all they use.
I think the issue with Walmart is their very low pay rates for staff. I boycott Nestlé and was really disappointed when they took control of The Body Shop. There are a number of larger companies and their subsidiaries that I won't buy from. I have an app on my phone from ethical.org that is country specific and is a handy little tool to take shopping. I refuse to give custom to any companies that use non sustainable palm oil, I don't buy any products with uncertified sustainable palm oil in them due to the devastation that palm oil plantations are causing, the use of palm oil will be the main cause of the extinction of the Sumatran orang-hutan, the Sumatran tiger, the Sumatran elephant and a host of other smaller species. It is truly tragic seeing what is happening in the low lying forests throughout Indonesia.
Fairtrade bananas Organic milk Organic root veg Nestle because the chocolate tastes bad Whiskas cat food because it's addictive Don't like Tesco and am seriously miffed at Sainsbury's because of prices