Reusable Water Bottles

The bottle that replaces single-use plastic and survives a whole school year. Stainless steel dominates, from 350 to 780 ml, with a painted body and a screw or clip cap; there is also light aluminium and clear Tritan. Double-walled versions hold cold for about twelve hours, so they reach the beach intact, while single-wall bottles weigh less in a school bag.