I'm translating a text about an antifungal cream sold in aluminum tubes. The plastic cap of each tube has a spike in it used to break the foil/seal in the neck of the tube.
I'm not sure what these spikes are usually called. I googled but failed to find a description. It is spike or some other term?
P.S. Original in Russian:
15 г крема в алюминиевой запечатанной тубе с белым полиэтиленовым колпачком, имеющим перфорационный пробойник.
Проколите запечатывающую мембрану при помощи острия на внешней стороне колпачка.
Best Answer
Spike, as you suggested, is a pretty clear term. Here is one source about eye ointment that uses this word:
Here’s another source about Fucidine Ointment: