Car Cup Holder Adapter for Large Bottles | 3D Printed Nalgene & Hydro Flask Insert (Fits Red Bull, Celsius)

Stop wrestling your big bottle into a cup holder that wasn't built for it. This 3D-printed car cup holder adapter widens your vehicle's cup holder to securely seat 32oz Nalgene bottles, Hydro Flask bottles, and other wide tumblers — snug with zero rattle on rough roads. It's designed for real use, not just plastic shelf pieces. Why it holds up: Heat-resistant PETG — won't deform when parked in the summer sun or in a hot cab. Reinforced internal structure prevents warping at high interior temperatures. Snug, vibration-free fit — your bottle stays planted through turns, braking, and bumps. Slim-can bonus — also cradles Red Bull, Celsius, and standard slim cans when you're not hauling a monster bottle. Drop-in install — no adhesive, no tools, no permanent mods. Insert and go. Great for: Road-trippers who live off a 32oz bottle Truck drivers and work commuters Gym-goers, hikers, and anyone carrying a Hydro Flask or Nalgene One of the most practical gifts for anyone with a big bottle and a small cup holder Made from durable 3D-printed PETG. Fits most standard and deep car cup holders. If your vehicle has an unusual holder, measure before ordering.