A metallic roll-on container for applying a product onto an external surface, comprising: a metallic container body extending along a longitudinal axis from a closed bottom end to an open top end wherein said metallic container body comprises an aluminum material; at least one arcuate-shaped sidewall of said metallic container body that defines an upper opening with a first diameter , a lower opening with a second diameter , and a maximum inner diameter between said upper and lower openings ; a roller sphere positioned in said open top end of said metallic container body and seated at least partially between said upper opening and said lower opening to define a chamber between said roller sphere and said at least one arcuate-shaped sidewall , wherein a diameter of said roller sphere is greater than said first diameter and greater than said second diameter , and said diameter of said roller sphere is less than said maximum inner diameter wherein said diameter of said roller sphere is between approximately 0.8% to 1.3% larger than said first diameter of said upper opening ; wherein, in a first extended position, said roller sphere is seated against said upper opening of said at least one arcuate-shaped sidewall , and said chamber is in fluid communication with said container and can receive a product stored in said container ; and wherein, in a second depressed position, said roller sphere is seated against said lower opening of said at least one arcuate-shaped sidewall , and said chamber is no longer in fluid communication with said product stored in said container , and wherein said roller sphere rotates to allow the application of said product in said chamber to an external surface. a metallic container body extending along a longitudinal axis from a closed bottom end to an open top end wherein said metallic container body comprises an aluminum material; at least one arcuate-shaped sidewall of said metallic container body that defines an upper opening with a first diameter , a lower opening with a second diameter , and a maximum inner diameter between said upper and lower openings ; a roller sphere positioned in said open top end of said metallic container body and seated at least partially between said upper opening and said lower opening to define a chamber between said roller sphere and said at least one arcuate-shaped sidewall , wherein a diameter of said roller sphere is greater than said first diameter and greater than said second diameter , and said diameter of said roller sphere is less than said maximum inner diameter wherein said diameter of said roller sphere is between approximately 0.8% to 1.3% larger than said first diameter of said upper opening ; wherein, in a first extended position, said roller sphere is seated against said upper opening of said at least one arcuate-shaped sidewall , and said chamber is in fluid communication with said container and can receive a product stored in said container ; and wherein, in a second depressed position, said roller sphere is seated against said lower opening of said at least one arcuate-shaped sidewall , and said chamber is no longer in fluid communication with said product stored in said container , and wherein said roller sphere rotates to allow the application of said product in said chamber to an external surface. <EOS>