Another vote for Vecova. Once a month they come and collect your bottles. Provide you with bags and email you a tax receipt. The email also tells you your total donations for the year. They text you 2 days before pick up to remind you to leave them out front.
The last time I donated I was told I was filling the bags too much and the workers (people with disabilities) had trouble lifting them. They're good people, doing good work and employing people who might have difficulty finding work elsewhere. They're a solid organization to support.
They'll take bags or a couple cases. You don't need to have a lot.
http://vecova.ca/social-enterprise/b...ainer-pick-up/