Learned this remarkably reliable technique from our guide Rodolfo in the Corcovado in Costa Rica - appropriately, on a Pacific beach lined with palm trees, the sounds of howler monkeys and scarlet macaws flying by. It works just as well in our London apartment.
Update: if you’re not on a beach and have some minimal tools you can rescue more of the water by drilling or poking through one of the three holes in the top and draining it first. Tip from Jose.
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