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You can only store in the special plastic bottles like the ones used for 1/2 litres ones. They are made special for storing 35% H2O2 (Hydrogen-Peroxid) cause over time the H2O2 (Hydrogen-Peroxid) releases slowly the oxygen and the bottle will fill up with ozone slowly, so the bottle will inflate very slowly. Thus the requirment for special plastic bottles. Glass made bottles are not good, they can crack under pressure.
You can buy the 2L bottle and pour in one 1/2L bottle for immediate use and store the 2L bottle in the _freezer_ wrapped with plastic bags and put in another plastic bag. Frozen H2O2 (Hydrogen-Peroxid) releases much more slowly than the cold H2O2 the one put in the refrigerator section of your fridge. And when you need to refill, just take out the 2L bottle and fill again the 1/2L bottle after it's been thawed.

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