DIY Plaster Hand Jewelry Holder. You Need: •Rubber glove (small) •Holding container •Plaster of Paris •Spatula •Disposable plastic container •Measuring cup •Water. Fold the edges of the rubber glove over the top of your holding container at least 3 inches and secure. We used a Stacking Mug Holder from World Market, but a 1/2-gallon Mason jar with removable lid would work as well. Mix the plaster of Paris using a spatula in a disposable plastic container.