with the containers i was using to water my Button babies it seemed like i was refilling it every couple hours or so...i was concerned that thru the night they'd run out and dehydrate so i made a waterer out of a Gladware "Mini Round" (1/2 cup) storage bowl and lid. It was so easy to make and holds quite a bit of water .Also it only cost me 3.00 for an 8 pack of them at a dollar store. All you do is take the mini round and punch or melt a small hole about the size of the lead of a pencil into the top edge of the bowl UNDER the lip. Then at the same place that you have the hole ,you cut out a narrow strip of the actual lip of the bowl. Turn the container right side up, fill it 2/3 with water, snap on the lid WITH the TAB lined up under the holes you made. Water should come out into the edge all the way around the bowl's lip plus into the tab area. Stick 1 or 2 small stones into the tab my babies love it and so do i cuz they get plenty of water and the lip is so small that it's just their size .Except for at the tab, there's no need for marbles etc. And 8 of them for 3.00 is just an added bonus !