One step better is the Victorinox Swiss Army Manager Pocket Tool. Adds a bottle opener, philips driver & pen in a slightly thicker package.
http://a.co/gsud2iY
Looks good! I like the SD though because it's cheaper and I'm constantly repurchasing them due to forgetting them when I go through security at airports.
These ones in America are fairly common, they're a plastic tube with a spring inside which you must awkwardly compress to remove the old roll and insert a new one.
- Japanese toilet roll holders
- 3M Command Strips