I'd get a big plastic container with a snug lid. Wash the container thoroughly, then microwave it for a few seconds just to make certain that there is nothing living inside. Next, buy a decent quality of rice - some of the cheaper rices have bugs whereas the higher quality ones are less likely. If you have a brand you like, buy a small quantity at first, take good care of it as outlined above and make sure that the quality is good. If you don't have any problems, then you can buy a larger quantity next time around. I like the Cambodian and Thai rices the best and many places sell them in bulk.

Good luck!