I hate buying a bottle of liquid only to discover I don't like it, most of us know the problem of trying it in the store and liking it, buying it, then bringing it home to discover it taste much different and we've just bought another bottle we hate. A store near me has just started to sell small sample tanks of liquids for a few dollars so you can take if home for a try. I think its a great idea. I'd much rather spend a few dollars on a small sample tank then buy a 15ml or even a 30ml bottle just to try the liquid and even if you don't like the liquid at the very least you have a spare tank. Now I understand some sellers have a small sample bottles but they are still overpriced for just a sample, so I think this small 1.5ml sample tank is a great inexpensive way to try some liquids.