If you accidentally closed a brand new one sharps container

On Dailymag sharps container, the lid has a permanent locking design, it is determined to ensure that the sharp container would hid sharps security.

If you permanently close the lid by mistake on a brand new sharp container, you can only use a hardware tool to force it open.

You must use a sturdy hardware tool to vigorously pry open the lid, restore the unlocked part on the lid, and then force the lid back to the barrel. You must ensure that the plastic parts on the lid are intact and not cracked or broken.
If it is a half-used sharps box, there are already some medical sharps waste in it. Do not try to open the lid again. For your safety, use a brand new sharps container then go back to your work.