I have asked the cart guys to fill and sometimes I do take sand from a cart and fill up. I have never had to dump out the bottle as I fill the back 9 par 3's tee boxes with a lot of sand.Good point... hang in garage and travel bag stays in car - or hoist the travel bag and cart up on top shelf in the garage.
Should I ask to fill my sand bottle or just take the contents of one on a cart?