Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: not reusable!

I assumed these were beads that we could use to fill up the extra space in our rock tumbler once the rocks smoothed out. Well, they are, but they are TINY.. so we had to throw them out after one use... (Too small to be strained from the sludge). If they were maybe marble sized and reusable, I'd be happy! Wonder if you could use marbles instead????