Stainless steel drink bottle. BPA-free and virtually indestructible. One of our customers dropped their bottle 50 metres whilst rock climbing - the bottle was fine, and we have replacement tops!
The top is a plastic Flip & Flow Lid with straw insert that we find handy for water on the go when one handed opening is required or you don't wish to unscrew the top and spill the contents. These bottles are also great for those wanting a silent water bottle for the bedside table, as the straw prevents the noisy sucking sound :-)