Fiolax®. Round bottom with rim. Light-walled and resistant to rapid temperature changes and localised heating.

Test tubes glass, with rim
Test tubes round bottom
Test tubes glass, with rim
Test tubes round bottom
Test tubes glass, with rim
Test tubes round bottom
Test tubes glass, with rim
Test tubes round bottom
Test tubes glass, with rim
Test tubes round bottom
Test tubes glass, with rim
Test tubes round bottom
Test tubes glass, with rim
Test tubes round bottom
Test tubes glass, with rim
Test tubes round bottom
Test tubes glass, with rim
Test tubes round bottom
Test tubes glass, with rim
Test tubes round bottom
Test tubes glass, with rim
Test tubes round bottom
Test tubes glass, with rim
Test tubes round bottom
Test tubes glass, with rim
Test tubes round bottom
Test tubes glass, with rim
Test tubes round bottom