I found myself wasting too much time, tape and energy placing labels on my frozen and fridge food containers. I bought WHITE duct tape and use a Sharpie to write contents on "labels" made from the tape. The ink comes off easily with soapy water for re-use, the tape remains securely on the lid "forever".
Rolled up pieces of duct tape with the sticky side out are an easy way to monitor where insects might be if you do not see them during the day. I like to keep them under the bed, in the bathroom, and in other places where they might be that I don't look often.