LabSand is a single-use easily disposable diagnostic kit, and should be disposed of after a single urine sample has been collected. However, if you need to test glucose levels over a period of up to 48 hours, you can use a paper towel to absorb the urine from the surface of the sand, so that the same species can urinate again on the sand. However, if there is any solid waste on the sand, it cannot be reused, as the sand will be contaminated for further use. Please keep in mind that LabSand is not an expensive diagnostic tool, and it really should only be used for a single urine test.