I love this new discovery and wanted to share it Hope you don't think me mad !!
My husband revealed that if you write on the little pots of puree etc to put in the freezer ie contents and dates with permanent Lumocolor/fineliner you can then remove it without scrubbing by going over it with wipeboard marker and then wiping with kitchen roll
Strange but true no more labels no more guessing !!
If you don't have these pens get someone to 'acquire' them from the work stationery cupboard!!
Give it a try