Thomas Scientific 1000ml media bottle with screw cap factory Laboratory Screw Cap Bottle, Clear Borosilicate Glass, 250ml (Pack of 2) $17.00 $13.60 +GST. LabDirect's own in-house glass laboratory bottle. Manufactured from borosilicate glass 3.3 which is resistant to heat and almost all chemicals. Autoclavable at 121°C and 1.1 bar for 30 minutes.