YETI Rambler Colster 250ml Slim Can Insulator - CharcoalYETI Rambler Colster 250ml Slim Can Insulator Charcoal The last sip should be as cold as the first. The YETI Rambler 250ml Slim Colster is built for those smaller, slimline cans that deserve the same ice cold treatment. Whether its a sparkling water, tonic, or slim craft beer, this rugged can insulator keeps it perfectly chilled from the first sip to the last. Engineered with double wall vacuum insulation and ultra durable stainless steel, it stands