hi parents any recommendation for water bottle (straw kind) that is easy to clean? My lo is currently using one which was a gift. however the straw is tilted in a weird direction that result in not being able to suck water when the bottle is abt 1/4 full.

It's easier for you to find those straw brushes that allow you to clean the interior. Nowadays got too many bottle brands out there and there might not be one best one. However, being prepared to clean the inside of any straw will make a better option. It's also much cheaper alternative!