Kids who are younger than 2 are still toddlers.
I just got this (literally yesterday) for my 18-month-old.
2-year-olds can perhaps handle glasses reliably. My 18-month-old can drink from a glass fine when I’m watching her. But she’s also quite inclined to throw it off the table when she’s annoyed or bored. There’s a reason parents like spill-proof (or at least spill-resistant) containers.