Totes (aka IBC's) are meant to be stacked at least 2 high when full.
Some can go 3 high!
For example:
"
When not in transportation and in a warehouse and filled to its maximum gross weight, Hoover’s metal IBC's can typically be stacked 3 high. The APR all poly IBC and the Tuff Tank II can typically be stacked 2 high when filled to their maximum gross weight in a warehouse.
"
https://www.hooverferguson.com/resource-center/faq.html
Here are better specs: metal cage IBC's (either 275 and 330 Gallon) can be filled & stacked 3 high, even when part of the metal structure is those plastic corners, or plastic base:
"Stackable 3 High"