When I am choosing sauces, I usually have several main criteria which I use. First of all, I look at the top. I prefer screw-on lids which are small and easily gripped between the thumb and forefinger. (Tabasco is an example of this, although maybe a little on the small side.) I also prefer that the cover have some sort of ridges which allow a good grip. (Again Tabasco is pretty good with its flats which make it into a polygon, although I do prefer more ridges.) The cover should have a clear, but symmetrical, manufacturing nipple. The color of the cover should complement the shelf upon which it sits. (I bring color swatches from my kitchen for comparison.) Next, I look at the label, and notice its shape. Many are just rectangular, and do not have an interesting shape. On these, I inspect the corners to make sure that they are neat, well-squared, and do not have any nicks. For more interestingly-shaped labels, I check the edge of the paper to see that it is smooth and free of tears, and that the cut is smooth. These flaws often indicate a lack of quality or a poor attention to detail, which will likely reflect on the whole product. The material of the label is also important. It should be glossy, but not the type which is likely to smear or pucker if the label gets wet. After several uses, I still want the label to be in good shape. (I really avoid paper which looks as though it was made from paper bags, such as "Pain is Good.") If it is possible to see it, I also look at the pattern which was used to smear the glue onto the back of the label. In some cases, there may only be a small dab at the corners, but I prefer the labels which look like the glue was spread with a serrated knife. This usually indicates a better holding power. The bottom of the bottle is very important. The bottle should sit level on the table. The rim of the base should be lightly roughened to limit any sliding or slipping. The punt (the concave depression on the bottom which domes into the bottle) should be proportional to the base, and should be neither too flat nor too arched. The manufacturer's code should be stamped into the bottle, and be clearly legible, indicating pride in their product. Next, I look at the place where the sauce was manufactured. Ideally, the city should have between seven and eleven letters, not counting the "St." It is best if it starts with a vowel, since people from these cities tend to be friendlier, and care more about detail. The IUPAC barcode should have six numbers, with at least one repeated digit. The label should not include printing quality test marks - these should be removed before the mounting. Of course, colors must be perfectly registered, although, upon occasion, if the colors are symmetrically misplaced around the black ink, the bottle could become a collector's item. I hope that this helps. Scott