"And if anyone gives even a cup of cold water to one of these little ones who is my disciple,
truly I tell you that person will not lose his (her) reward."
This is a most tender gospel verse reflecting the kind awareness of Jesus - and his invitation to do the same. Notice that Jesus says cold water. This means the little gift is considered, that the gift comes from the heart, that the giver has taken extra care so as not to give water that is hot from sitting in the sun in an already uncomfortably dry climate. Jesus intends that the water-gift be refreshing and renewing. Love is in the details.
We might also take note that the command of Jesus is positive: he does not say, avoid or don't or thou shalt not - but he defines kindness and love by the word give.