ENERFOAM ENER24, 24OZ ENERFOAM STRAW FOAM Reusable: Saves money. Minimizes waste. Store cans for up to a week for reuse. No more foam drips. Plug in the straw when finished. Unique mechanical valve. Spring loaded for reuse. Won't glue shut after use. Foam can be trimmed in less than one hour, skin time is less than six minutes. ITEM CAN ONLY BE SHIPPED VIA GROUND