A bottle and a glass are displayed to the audience. Put them on the table and cover them with two empty tubes. Picking up the covers, you see that the bottle and the glass have changed places. Do it again to restore the original position. Do it again and much to the audiences surprise, when you pick up the tubes, two bottles appear from beneath the tubes. Every time you pick the tubes, appear until there are more bottles on the table.
Bright labels! Lightweight!
Two of the bottles even has a liquid compartment, so you can actually pour a drink at the end!