I have an ultraviolet halcyon PIKA and it is quite flat. I took it on a Caribbean cruise in January to hold my IPhone 8+ (in a case that can hold 3 cards), 3 passports and a flat pack of gum. I did try putting my small key ring in (car fob, house/mailbox keys) and it did make it bulge out more than I liked. I don’t think the small hand sanitizer would fit well, and it would make it hard to access the other items you want to carry. But that is just my humble opinion. My daughter will hopefully use this if she is able to go to Scandinavia in April. Hope this helps!