I dont know, but just bottle them yourself, buy a tin, decant it into glass bottles, with the liquid it comes in, as it already has preservatives, fill it to the brim though, any air will decay the pips faster. you can also fill the bottles with different concentrated flavours (the moirs type is the best cheapest and biggest range) and water 5 days before you go on a trip, that way out of one tin you get as many flavours as you have food flavourants...