Borealis said its PP grade RE450MO cap is designed for bottled water, as well as sports and energy drinks. The RE450MO retains the natural taste of the liquid inside while delivering design possibilities not previously available with existing PE or PP caps, the company claimed. "This new solution supports the beverage industry's ambitions to create ever-more sophisticated and differentiated user-friendly closures," the company stated. RE450MO is made using Borealis technology that allows the tailoring of molecules by combining good mechanical properties with good processability. "The strength, flexibility, easy integration of colouring and organoleptic properties of the new grade, provide product differentiation and recognition for brand owners and attractive, safe, user-friendly packaging for consumers," the company stated. The material does not contain additives that could taint the natural taste or odour of the bottled product, the company sated. "Retaining the natural taste and odour of a bottled liquid is a top priority," Borealis stated. "Until recently, the organoleptic properties of PE have made it the only option for unlined caps used for taste sensitive drinks such as water." RE450MO contains ultra-low levels of volatile organic compound (VOC), giving the material high purity, the company stated, citing tests that show that the material is similar to the taste and odour properties of standard PE grades commonly used for beverage caps. RE450MO also has good flow, low stress whitening and good hinge performance, the company claimed. "Its flow flexibility allows versatile designs based on transparency, translucency or colouring," the company stated. "Hinges and closure fittings can withstand the stress of repeated use with minimal discolouration." Borealis worked with Seaquist Closures to develop the cap.