I collected a class set of empty butter tubs and filled them with approx. 25 snap cubes of 3 different colors. During math warm-ups, the students can use a tub to practice counting, patterning, positional words, adding, subtracting, etc. and you can pass out and collect these mini math tubs in less than one minute. It sure has saved me time! You could also adapt to fit your needs- put dice, counters, timer, etc. for a fast game tub...