BIGiDESIGN - or Big Idea Design - make a variety of EDC (Every Day Carry) gear, including some rather special pens. So what's the big idea? Titanium pens that can use all sorts of different refills! If you already have a favourite refill, there's a good chance these pens can use it. But if you're still undecided, or just enjoy trying out different refills and changing your mind all the time about your favourite (we can relate!) these give you the chance to do just that, with one pen.