Stamping your name on every single promotional item you can find will not ensure big brand buzz, but may certainly fill up circular filing cans fast.
Printing your logo on promotional items can be an effective branding tactic or a useless expense. It is up to you.
I found these cool, contemporary water bottles at epromos.com
Think about the material and design of the giveaway item. Is it slick and trendy like your company?
Or is your brand rustic and eco-driven?
Also consider how you package and deliver the item to your market. There may be more brand leverage opportunity here.