There's a few breweries that have used this bottle design. Grolsch is one of them that comes to mind that still does. I've seen it called "flip top", and "EZ cap", but it looks to me like "swing top" is more commonly used.
I highly doubt you have anything to worry about legally. Micro breweries that use a bottle deposit system have the bottle cost in the price, which is credit back towards you next purchase when you return it.
'Swing top' makes sense to me and is easy to remember! -thanks.
I didn't think I was in any trouble, but stealing bottles from breweries in other countries and then selling them for more than the deposit just seems wrong
is what I bought them for