Inspired by European interior design sensibilities, the Cambridge Collection is the perfect addition to your outdoor or indoor space if you're looking for a traditional planter with a twist We use 100 highgrade Polyethylene resin in the manufacturing process making them weatherproof and giving them an ultratough construction These planters have a builtin water reservoir that helps promote plant growth Drainage holes to be predrilled by customer, if the planter is to be used outdoors.