I use the square tubes, they look the same as the ones there... the lids do not screw on, but they have a definitive snap to them and they do not pop open if that's what you're worried about.
OK, Thanks. That was one of the things I was worried about.
Also depending on how many you need you might be able to get them from an online coin supply company at an even lower cost.
I have checked a few coin supply places, and most of them do not offer shipping to Canada.
Want to Buy: PCGS Graded 1878-S Morgan dollar