If they are nearby parvinkaurp why not use a watering can? Or a quantity of soft drink bottles? I use both and carry the bottles in my old milk bottle carrier (those were the days, when milk was delivered ) just leave the tap water in the bottles for a few hours to let the gasses evaporate and all will be well.
"The trouble with having an open mind, of course, is that people will insist on coming along and trying to put things in it." Sir Terry Pratchett
There are currently no water restrictions or hosepipe bans in the UK*, and comments from those in the know are that there is unlikely to be any in 2018 despite the current hot conditions. There was plenty of rain in the earlier part of the year to ensure there is more than enough groundwater keeping rivers, lakes and reservoirs full. Of course, it always makes sense to use water sensibly like any resource.
* Correction - Northern Ireland introduced one on the 30th June!
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* Correction - Northern Ireland introduced one on the 30th June!