No. Do use a pen or any other writing utensil. If you want to go this route, I suppose you could use a VERY well-cleaned screwdriver, large nail, awl, etc.,...
Sounds like you might just puree up some mangoes with a little sugar. I would recommend making it only in small batches, because the lemon juice is what keeps it...
According to Foodie with Family, ”You can put the container or bag directly into the freezer (letting it sit for at least a week before using) for up to 6...