This tiny 0.2L / 6.7oz water bottle. : r/mildlyinteresting
BOUTEILLE AIR MILOPS 0.2 L ALU 3000 PSI
Fincos 0.05-0.5L/min 0.1-1L/min 0.2-2L/min PMMA Panel Type Gas Float Flowmeter Air Flow Meter Rotameter with Control Valve - (Specification: 0.05-0.5L min): Amazon.com: Industrial & Scientific