Like others, I purchased some nail polish for family members for Christmas, but there is no good way to wrap just a single bottle of nail polish.

Are you OCD enough that you'd be willing to buy a small gift box for those sweet corners? Don't waste the money, just like $0.25 of filament on this print and the problem is over in under 2 hours. Simply print as a single layer and with an open top and no infill (1 perimeter wall, 1 layer on bottom, 0 layers on top). The smaller bit fits over the top of the tall box and there is plenty of room for a bottle of nail polish.

I plan on recycling the boxes into guitar picks if they don't want to keep them in order to not be wasteful, but it's only just over 10g in plastic.