Antonyms for the phrase "pour down the drain" include "collect," "save," "retrieve," and "preserve." When we pour something down the drain, we let it go to waste or dispose of it completely, which means we lose that resource entirely. However, if we collect or save it, we can use it again in the future. Similarly, if we retrieve something that was once thought lost, we can bring it back into use or save it from being wasted. Finally, preserving something ensures that it remains in excellent condition for future use. Instead of pouring things down the drain, we should strive to collect, save, retrieve, or preserve them for a better tomorrow.