On my GP's advice, I bought some Vitamin D supplement the other day.
As befits something vaguely medicinal, the tablets come in a sturdy plastic container with a strong 'pull off' seal strap.
The pack is 3 inches tall, that's 78 mm for us remainers.
On opening it, however, the tablets barely cover the base.
There's a lot of fresh air and plastic left over. Probably enough of the latter to choke a porpoise