I bought ours at Eugene Club - I think the brand is called Bettercare. It works perfectly for us. You can either use pressure or screw it into the wall. I had gone to Toys'r US and although they had a couple of different brands, they were sold out and couldn't tell me when new stock would arrive. They also have some at Bumps to Babes - we tried one brand (sorry can't remember the name but it's British) and it didn't work well. The lock wasn't secure enough. Returned it after 2 days.