I want to grow lettuce in my home this winter. I have seen people grow food in things that were not made for the purpose ( office paper trays, bureau drawers, food service containers, white construction buckets). I know some plastics can leak dangerous chemicals into water, especially if they get scratched. I need shallow, lightweight containers with no holes. I might need to drill holes in some containers, and use others for liners. Any ideas? Thanks for helping.