Sweetened Condensed Milk Iii
Normal milk contains 0.1% whereas colostrum contains 6 %. Milk fat The digestibility of milk is comparatively higher than other oils and fats. This can be attributed to existence of fat globules in aqueous phase forming an emulsion. This facilitates its easy absorption through the intestinal tract when compared to other fats which have to be emulsified with bile salts enzymes from pancreas and fat splitting lipases. Endowed with short and medium chain fatty acids milk fat can be easily absorbed when compared to long chain fatty acids because of the ability of the lipases to split the ester bonds in the former. Supplementation of milk fat in the diet increases the energy density. When compared to human milk the cow milk is low in essential fatty acids such as linoleic and linolenic acids.
You can reduce your risk by initially setting a limit of $10 rather than $20 but if you are not comfortable with a little risk and taking a small loss of some of the bottles you buy then this is a sub-niche you should avoid. Here are some additional general hints & tips to remember when purchasing these bottles...Never buy a bottle that has any chips or cracks no matter how small or seemingly insignificant. The condition of the Pyro-Glaze design is extremely important - avoid any bottles that have chipped faded or scratched Pyro-Glaze as well. These bottles were to be used and then returned to the dairy where they were cleaned and reused. After extended use and cleaning some developed numerous small scratches to the glass. You should avoid bottles that exhibit severe scratching.
You can find some good information regarding how to identify reproductions along with some pictures of known reproductions from various online sources. If you are interested in learning more about these bottles there are two books currently available that provide some excellent information about how they were made and used along with some basic pricing information. The book are titled "Udderly Beautiful" and "Udderly Splendid" by John Tutton. Both give some rarity and pricing information but because of the large number of bottles produced they don t cover even a small fraction of the bottles produced. Both can be found for sale on either eBay Amazon or in some antique shops. Other sources of information are The National Association Of Milk Bottle Collectors and the individual web sites many of their members maintain.