The local product here is 1.5L only at around $15, this is 2.5L at around the same price if you spend more than $59 on Amazon AU. You may stock them up as they don't tend to have expiry date.
COVID-19_Essential Items Special Promotion Reusable Mask (Anti-bacterial) L : $8.99 -> $5.99 PM2.5 (95% Protection) Single Mask : $6.99 -> $2.99 Medical Surgical Mask : $2.99 -> …