Nalgene

We take water bottles with us pretty much everywhere we go.  Fill 'em up at home (we have a filter on our kitchen faucet), put 'em in the car/backpack/etc.  And the water bottles we use are Nalgene.  They have a lot of great features:

• Priced reasonably
• Dishwasher safe
• Impact resistant (my kids have tested this repeatedly)
• Easy to drink from
• Cool loop on the lid making it easy to carry and hard to lose the lid
• BPA free
• And Made in the USA