OLO Pickup Time Window

The Current OLO lets you select 5-minute intervals for a pickup time. 

Rather than having this, it would be better to have pickup windows. 

For example, If it is currently 12:05PM. When I select the "Future Order" section then it should show me the following times. 

(based on 15-minute interval) 

12:15PM - 12:30PM

12:30PM - 12:45PM

12:45PM - 1:00PM

Etc...