There is a line of licensed Lego drinking bottles out called Lego Drinking Bottles. The bottles, which hold 400ml, feature a Lego minifigure head on a solid color bottle. The bottles are made from plastic-polypropylene and PVC free. The bottles are BPA-free. The bottles open on both the top and bottom. They are safe to use on the top rack of the dishwasher.
The colors include blue, light blue, red, pink, black and white. The bottles can be found on Amazon.com
Photo: Lego Group