or other plastics in the preferred embodiment the thickness of the plastic after forming is approximately 0 020 inches while the disposable mixing well shown in fig1 and 2 works well it is very small and accordingly there are problems with handling packing and storing the individual wells typically disposable mixing wells of this type are packaged together with dental materials in kits the present invention manufactures individual disposable mixing wells in a different manner than heretofore practiced in the present invention a plurality of individual wells 10 are formed from a single sheet of plastic 22 the individual wells 10 are laid out in a plurality of rows and columns in the illustration of fig3 the sheet has three rows each row having four individual wells but other arrangements can of course be used the boundaries between the individual wells is denoted in fig3 by lines 24 marking the division between rows and lines 26 marking the division between columns the boundary lines 24 and 26 show the location of separation means which normally connects the individual mixing wells 10 but which allows individual wells to be separated from one another by the manual application of moderate force the separation means may be formed in various ways in the preferred embodiment the separation means is formed after the step of forming the plurality of wells 10 on sheet 22.