To save your points, turn off ‘Redeem my points’ in the Tims app. You can do this from the ‘Scan’ page, or the ‘Redeem’ tab of the ‘Rewards’ page.
That way you’ll be banking your points rather than redeeming them when you scan for rewards.
When you’re ready to start using your points again, simply toggle on 'Redeem my points' and choose a Reward Level.
To change between redeeming and banking your points, head to the ‘Rewards’ page. The ‘Redeem my points’ setting is under the ‘Redeem’ tab.