The argument for reusable glass over single-use plastic isn't complicated. It's just not obvious — until you walk through what actually happens to each material over its lifetime.

Plastic bottles dominate because they're cheap, light, and convenient. Glass dominates because it's stable, refillable, and endlessly recyclable. The interesting comparison isn't 'glass good, plastic bad.' It's where each one wins, where each one fails, and what changes when you put each in a refill-and-return loop.

Lightweight portability. A 1-liter plastic bottle weighs a few ounces. A 1-liter glass orb weighs nearly 2 pounds. For backpackers, cyclists, and anyone carrying water all day, plastic — or stainless steel — is the right call. We sell reusable cotton and Yulex carrying cases for our 1 Litre Orb and 1 Gallon Globe precisely because glass deserves protection when it's in motion.

Cost at point of purchase. A case of bottled water at the gas station is $5; our glass jug deposit is $33 refundable, and the water itself is delivered. Plastic wins on sticker price every time. It loses on amortized cost, environmental cost, and what you're actually putting in your body — but those are longer-horizon calculations.

Disposability. If you're going to use something once and throw it away anyway (an event, a beach day, an emergency kit), plastic is the rational choice. The case against plastic is the case against single-use plastic specifically.

Carbon footprint. The case for plastic is sometimes made on shipping weight — lighter bottles, less fuel. But a refillable glass jug, amortized over 50+ round trips, beats single-use plastic on per-gallon carbon after the second or third delivery. The first delivery has high embedded carbon (manufacturing the jug); every delivery after that shares that cost across more water served. By month six, the per-gallon footprint of our refillable glass is lower than bottled water shipped across the country.

What you actually put in your body. This is the part that's hardest to argue with. Glass keeps water exactly as it left the spring. Plastic — even food-grade, BPA-free plastic — sheds microplastics into whatever it's holding. A 2024 study published in PNAS found that the average liter of bottled water contains around 240,000 nanoplastic particles. Most are small enough to cross cell membranes. Glass bottles in the same study showed essentially zero.