Yep, your sugar is on the high side. Probably about 1 tsp/700ml would be more correct. I would imagine the 700ml bottles you used are probably on the thick side which would be a good thing. You may want to put the bottles somewhere where they can't do any harm just in case a couple of them do let go. Maybe put them in a cooler with the lid closed or something like that. Better safe then sorry.
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