When using outdoors， prior to planting， invert container and remove rubber stopper. Store rubber stopper in safe place to use at the end of growing season. Removing the stopper will allow water to properly drain from the Countryside planter. Lightweight and UV-resistant plastic material Purposeful ridged layers ensure ruggedness and sustainability Can be placed on flower box brackets under windows， on porches and decks， or along walkways Plastic resin Made in USA Your security is our number one concern