Glass and acrylic cups are generally designed to be used as much as you want and pose no problem here. However, there are also a lot of plastic dessert cup packs. Most of these are designed to be disposable. You may be able to wash and reuse cups made from particularly tough plastic, but we don’t really suggest this unless the cups are specifically designed for two or three uses (our second pick is an example of this). If you want to reuse a dessert cup, get a set that’s meant to last.