I’ve heard a lot of bad things regarding HDPE plastic bottles , I would rather not take the risk , and currently i have been using 2l conical glass flasks with make shift lids
But how about these ? As quoted from the site
“Corning 431252 Sterile 3 Litre Non Baffled Erlenmeyer Culture Flask with Vent Cap
Corning® Erlenmeyer Cell Culture Flasks
Corning baffled bottom Erlenmeyer flasks are sterile, disposable and are ideal for all shaker culture applications as well as liquid handling and storage. Like all Corning flasks, the flasks are certified nonpyrogenic and sterile. The 125 mL through 1 L Erlenmeyer flasks are available with standard two-position plug seal caps or filtered vent caps.
More Robust
• Polycarbonate construction: USP Class VI material provides excellent optical clarity and mechanical strength
• Unlike PETG, flasks will not collapse when autoclaving media or sanitizing waste
• Unlike glass, flasks will not break when dropped
More Reliable
• RNase- and DNase-free
• Molded-in-graduations for accuracy
• Vent cap option for continuous gas exchange while ensuring sterility and preventing leakage
• Individual packaged and radiation sterilized
• All flasks have the highest Sterility Assurance Level (SAL) of 10-6
• Certified nonpyrogenic
• Made from optically clear polycarbonate
• Ideal for shaker culture applications
• Vent caps available for applications requiring sterile gas exchange
• Sterilized by gamma radiation and certified nonpyrogenic
“
Thanks , if someone has good knowledge please offer your opinion
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From anger, complete delusion arises, and from delusion bewilderment of memory. When memory is bewildered, intelligence is lost, and when intelligence is lost one falls down again into the material pool." - Lord Krishna