You can get one of these Nalgene Narrow Mouthed Loop Top Water Bottles for $3.75 from REI. These have minor cosmetic blemishes but this is an exceptional price for this brand.
They are normally $9.00. I think the narrow mouthed top makes drinking easier- especially for little ones.
These bottles are BPA free and dishwasher safe (top rack).
Select in store pick or free shipping on $50 orders.
Awesome find…I love this size and narrow opening.