The aim of this study was to analyse changes in selected physical properties during storage of cocoa beverage powder with a modified composition of raw materials. The scope of work included analysis of dry matter content, bulk density – tapped and loose, flowability, angle of repose on glass and metal surfaces, colour, and wettability of materials and mixtures with different raw material composition. Material consisted of food powders (cocoa, sugar, maltodextrin, glucose, fructose, milk), and mixtures derived there from. To pack the products analysed plastic jars were used, as well as aluminium foil which was welded, and then vacuum was produced inside. The products were stored for 6 months, with analyses performed every two months. Based on the analyses carried out it was demonstrated that the showed the impact of raw material composition, storage time and type of packaging used had an impact on the values tested. A significant effect of storage was shown on bulk density and flowability, which is important for packaging of bulk products and their transport. It was also found that storage time had an impact on the water activity, which in turn determines changes taking place in food, mainly of microbiological nature. Lesser changes, or lack thereof, were demonstrated in samples stored in vacuum compared to the products stored in plastic boxes.