Thinksport's double-walled, vacuum-sealed, stainless-steel bottle distinguishes itself with a well-designed, dual-opening lid with small and large screw-tops. The smaller offers a dime-sized opening for drinking, and the larger conceals a removable mesh guard that keeps ice inside the bottle when you drink from the small spout. The bottle's slight hourglass shape makes the large bottle easy to hold, although it won't fit in a standard cupholder.
The 350-ml bottle fits in standard cupholders and works great for those not too far from a refill. At three years old our daughter was using this bottle as her water bottle of choice, and as long as we didn't screw the top lid too tight, she could manage it all herself. This is a great bottle for adults wanting a smaller profile bottle but the benefits of double-walled insulation and stainless-steel durability.