Apart from the SGS branding/logo is there any thing on the bottle to show the original shop you got it from ? Just wonder if another supplier of SGS (say the cheapest one of the four) would be fussy about exchanging it. Also would any of the others give you your deposit back when you no longer need the bottle as the receipt you have would I guess be from the original supplier of bottle. What happens to your deposit if the original shop goes out of business ?