recycle bins and recycle attachments for stacking and condensing discarded paper cups and plastic glasses inside each other . the process of stacking cups and glasses in a series will greatly increase the available space within recycle bins by eliminating the “ wasted empty space ” void typically found within empty cups and glasses . accordingly , recyclable containers will need to be emptied less often which ultimately saves municipalities time , money and maintenance . additionally , this invention greatly aids in the later sorting and processing of recyclables .