FUNCTIONAL: Double wall construction with copper-plated inner walls for optimal conductivity to keep liquid cool for 48 hours and hot for 12 hours. 500ml capacity.

DURABLE: High grade 18/8 stainless steel outer wall with vacuum insulation, leak and rust proof, 100% condensation-resistant so there will be no drips in your gym bag.

ECO-FRIENDLY: 100% BPA free

DESIGN: Sleek, lightweight, and perfectly sized for your gym bag.