Bolis ice pops, the classic tube-shaped frozen treats, are widely available both in physical stores and online. Because they are shelf-stable before freezing, you can often find them in the juice or snack aisle rather than just the freezer section.
If you want to stock up or find specific flavors not available locally: What Are Bolis? Your Guide to Mexican Ice Pops & Flavors! where to buy bolis ice pops
Walmart frequently stocks them in their frozen or snack sections. Some Target locations also carry them or similar variety packs. Bolis ice pops, the classic tube-shaped frozen treats,