Wiktionary
screw caps
n. (screw cap English)
Usage examples of "screw caps".
Of course, there were pipettes and rubber bulbs, petri dishes, and the flasks with screw caps where the virus was actually growing.
Things left at hurried, sloppy angles, things that would have been straightened or used up or finished if the tenant had only had the chance to return and screw caps back on, sit on the can one last time, give five minutes to finishing the dumb article on his favorite TV star.
Once Marissa completed the packing, making certain that all the screw caps were tightly in place so that carbon dioxide from the dry ice could not penetrate the samples, she personally rode out to the airport and sent the boxes on their way to Atlanta.