Storing dirty cups & cutlery etc until you can wash them
So, my partner and I have a fairly decent camp setup: a swag, chairs, and a small, folding table with a storage cupboard, which we use for morning coffees with a Jetboil stove and for keeping everyday items within easy reach. Because our vehicle is on the smaller side, we don't yet have room for much water storage & and dedicated camp kitchen, so we're still relying on campsite BBQ/kitchen/wash basin facilities rather than running our own stove & wash basin.
After dinner (after washing up the main dinner items), we often end up with dirty cups, cutlery and a small pot from drinks and snacks around the campfire. I've been tossing these into the storage cupboard to wash the next morning, but unsurprisingly that attracts insects. Is there something I could use to store or seal away the dirty items overnight (a bag or sealable container of some kind that I haven't found yet) to keep the bugs out of the cupboard until we can wash up in the morning?
FYI, we live on east coast of Australia so lots of insects around! Especially in the warmer months....