The core DUALIE: a vacuum insulated 304 stainless sleeve with a swap cap system that takes standard 12 oz cans, tall slim cans and 12 oz bottles.
A mid blue with gray in it, deeper than Glacier and lighter than Navy, filling the gap between the two.
The 3 in 1 is the model the brand is named after and the one most people buy first. The sleeve is 304 stainless with a vacuum gap between the walls, which is the same construction used in insulated bottles and the reason the outside stays dry: there is no cold surface for room air to condense on. What is different here is the cap. Instead of one fixed opening sized for one container, the cap swaps, and the swap is what lets a short 12 oz can, a tall slim can and a 12 oz bottle all sit tight in the same tube.
All seventeen finishes are the same object underneath, so the choice is genuinely about looks and about how the finish behaves. Powder coating is tough but it is a coating, and darker saturated colors show a scratch more readably than a mid gray does. Light colors run cooler in direct sun and show dirt sooner. Stainless skips the coating question altogether. Every color page on this site says what that particular finish is like to live with rather than repeating the same paragraph seventeen times.
The body measures 3.1 inches across and 5.5 inches tall, which clears most car cup holders and most camp chair pockets. It is dishwasher safe and BPA free. If you want the same cooler with something extra bolted on, the Lower Deckie adds a tin in the base and the Tracker adds a score ring around the middle.